Best Supplements for PCOS

Abstract

The best supplements for PCOS are those that address the root causes of the condition: insulin resistance, chronic inflammation, and elevated androgens. Clinical research points to three as the most evidence-backed foundation - Inositol at the 40:1 myo-inositol to D-chiro-inositol ratio, Omega-3 fatty acids (focusing on active EPA/DHA content), and Vitamin D3 (paired with K2 for safety). Beyond the core trio, targeted supplements like zinc and spearmint help with hormonal acne and hirsutism, berberine and chromium support blood sugar stability, and CoQ10 and NAC offer reproductive benefits for those focused on fertility. Quality matters enormously - always check for third-party testing, explicit ingredient ratios, and bioavailable forms. And give any protocol at least three months before evaluating results, since egg development alone takes 90 days.

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Table of contents

  1. 01. Do Supplements Actually Work for PCOS?
  2. 02. The "Core Three" Foundational Supplements for PCOS
  3. 03. Targeted Supplements for Specific PCOS Symptoms
  4. 04. At-a-Glance: PCOS Supplement Comparison
  5. 05. The PCOS Fertility Shortlist: Supporting Egg Quality & Ovulation
  6. 06. Safety First: Risks, Side Effects, and Supplement Combinations

📌 In a nutshell: The best supplements for PCOS target the root causes of the condition - insulin resistance, chronic inflammation, and high androgens. Clinical research points to a core trio of Inositol (at the 40:1 ratio), Omega-3 fatty acids, and Vitamin D3 as the most evidence-backed foundation. Eggs take roughly 90 days to mature fully, so give any supplement protocol at least 3 months before evaluating results.

If you've been living with PCOS for any length of time, you've probably spent hours scrolling through conflicting advice - some saying supplements are life-changing, others dismissing them entirely. The truth is somewhere in the middle, and the science is actually quite clear once you cut through the noise.

Supplements are not a cure for PCOS. But for a condition driven by underlying metabolic and hormonal imbalances, the right ones - chosen strategically, not randomly - can meaningfully shift how your body functions. They fill nutritional gaps, support metabolic pathways that are often disrupted in PCOS, and complement the lifestyle changes that remain the real foundation of management.

In this guide, we break down which supplements have genuine clinical evidence behind them, what they actually do in your body, and how to choose quality products that are worth your money.

Do Supplements Actually Work for PCOS?

This is the right question to ask - and the honest answer is: it depends entirely on which supplements you take, and why. PCOS isn't one thing. It's a hormonal syndrome driven by several different underlying mechanisms, and the most effective supplements are those that target your specific drivers.

Most women with PCOS have at least one - and often several - of the following disruptions happening at a biochemical level:

  • Insulin resistance: your cells don't respond well to insulin, so your body produces more of it. High insulin stimulates the ovaries to produce excess androgens (male hormones), which disrupts ovulation and causes many of the most visible PCOS symptoms - acne, hair loss, irregular cycles.
  • Chronic low-grade inflammation: PCOS is now understood to involve ongoing, subtle inflammation throughout the body. This inflammation worsens insulin resistance and further disrupts hormone balance.
  • Hyperandrogenism: elevated androgens like testosterone and DHEA are present in the majority of women with PCOS, driving symptoms from excess body hair to thinning scalp hair and persistent breakouts.

Supplements that address these three pathways - backed by clinical research - are the ones worth considering. Supplements that don't target these mechanisms are largely noise.

👉 To understand more about the root causes of PCOS and how they manifest, read our article What is PCOS? on the SOVA blog.

The "Core Three" Foundational Supplements for PCOS

What supplements should I take with PCOS?

Women with PCOS should prioritise supplements that target the root drivers of the condition: insulin resistance, chronic inflammation, and elevated androgens. Clinical research consistently highlights three supplements as the most evidence-backed foundation: Inositol (specifically the 40:1 myo-inositol to D-chiro-inositol blend), Omega-3 fatty acids, and Vitamin D3.

Inositol (The 40:1 Ratio) - For Insulin Sensitivity & Ovulation

Inositol is one of the most researched supplements in PCOS management - and one of the most misunderstood. There are different forms of inositol, and not all of them work equally well. The one that matters most for PCOS is a specific combination of myo-inositol and D-chiro-inositol at a 40:1 ratio.

Here's why that ratio matters: inositol acts as a "second messenger" for insulin - it helps carry the insulin signal into your cells. In healthy ovarian tissue, myo-inositol and D-chiro-inositol exist at a natural physiological ratio of 40:1. Research has shown that in women with PCOS, this ratio is disrupted - myo-inositol gets converted into D-chiro-inositol too quickly, depleting the myo-inositol that ovarian follicles need to mature properly (1).

A clinical trial comparing seven different inositol ratios found that the 40:1 ratio was the most effective for restoring ovulation and normalising key hormonal and metabolic markers in women with PCOS (1). The standard clinically studied dose is 4,000mg of myo-inositol combined with 100mg of D-chiro-inositol per day, typically split into two doses.

A 2024 systematic review and meta-analysis published in The Journal of Clinical Endocrinology & Metabolism, which informed the 2023 international PCOS guidelines, confirmed inositol's benefits for various metabolic outcomes (2). A separate meta-analysis of 17 studies found that myo-inositol supplementation during assisted reproductive technology (ART) cycles significantly increased clinical pregnancy rates (3).

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Discover Ovastart, our inositol-based supplement designed for women with PCOS.

Omega-3 Fatty Acids (High-EPA) - For Chronic Inflammation & Lipids

Omega-3 fatty acids - particularly EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) - are among the best-studied anti-inflammatory nutrients in existence, and the evidence for their role in PCOS is compelling.

A meta-analysis of 10 randomised controlled trials including 610 women with PCOS found that omega-3 supplementation significantly reduced CRP (a key marker of inflammation), lowered total testosterone levels, and reduced LH - all markers that are typically elevated in PCOS (4). Another meta-analysis of 4 randomised controlled trials confirmed a significant lowering effect on total testosterone specifically from EPA/DHA supplementation (5).

Beyond inflammation and androgens, omega-3s also support lipid profiles - women with PCOS are at higher risk of elevated triglycerides and low HDL cholesterol, and omega-3s directly address both.

When choosing an omega-3 supplement, focus on the active EPA + DHA content rather than the total fish oil volume. A bottle might say "1000mg fish oil" on the front while containing only 300mg of actual EPA/DHA - the rest being inactive fats. For PCOS, research has used doses of 1,000-3,000mg of combined EPA/DHA daily. Also check the TOTOX value (a measure of oxidation) - rancid fish oil is both less effective and potentially harmful.

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Vitamin D3 with K2 - For Metabolic and Mood Support

Vitamin D deficiency is remarkably common in women with PCOS. Multiple studies show that between 67% and 85% of women with PCOS have insufficient vitamin D levels - a significantly higher prevalence than in the general population (6). One 2025 study of 195 women with PCOS found that vitamin D deficiency was present in 84.1% of participants and independently predicted insulin resistance even after accounting for body weight (7).

This matters because vitamin D isn't just a bone health nutrient. It acts more like a hormone in the body - it has receptors in ovarian tissue and plays a role in follicle development, insulin signalling, and inflammatory regulation. Low vitamin D levels have been associated with more severe insulin resistance, higher androgen levels, and more irregular cycles in women with PCOS (6).

It's worth pairing vitamin D3 with vitamin K2. Vitamin D3 increases the absorption of calcium from food, and K2 acts as the traffic controller that directs that calcium into bones and teeth rather than into soft tissues like arteries. The combination is more physiologically complete.

Because deficiency levels in PCOS are so common, it's worth getting your vitamin D level tested (a 25-OH vitamin D blood test) before supplementing, so you can dose appropriately. Your GP can arrange this.

Targeted Supplements for Specific PCOS Symptoms

Once you have your foundational trio in place, you can layer in targeted supplements based on your most prominent symptoms. Here's what the evidence shows for the most common PCOS concerns.

What supplements are good for hormonal imbalance and PCOS?

The most effective supplements to address hormonal imbalance in PCOS include:

  • Inositol (40:1 blend): lowers testosterone and supports regular ovulation by improving insulin signalling in the ovaries.
  • Zinc: acts as a natural androgen blocker, reducing the conversion of testosterone to its more potent form DHT.
  • Spearmint extract: clinically shown to reduce free testosterone in women with PCOS.
  • N-Acetyl Cysteine (NAC): an antioxidant that reduces oxidative stress in the follicles, supporting egg quality.

For Excess Hair, Acne, and Hair Loss: Zinc & Spearmint

Hormonal acne, excess facial or body hair (hirsutism), and thinning hair on the scalp are among the most distressing symptoms of PCOS - and they're all driven by the same root cause: elevated androgens acting on hair follicles and skin cells.

Zinc may help moderate the activity of the enzyme responsible for converting testosterone into its more potent form, dihydrotestosterone (DHT) - a direct driver of androgenic hair loss, excess sebum (which contributes to acne), and hirsutism. Two randomised, double-blind, placebo-controlled trials in women with PCOS have found that zinc supplementation measurably reduced androgenic hair loss and improved hormonal profiles (8, 9). A typical dose in clinical studies is 15-30mg daily. If supplementing long-term, pairing with 1-2mg of copper is worth considering, as higher zinc intakes can affect copper absorption over time.

Spearmint (as tea or standardised extract) has randomised trial data behind its anti-androgenic effects in women with PCOS. A 5-day trial (Akdoğan et al., 2007) and a 30-day randomised controlled trial of 42 women with PCOS (Grant, 2010) both found that drinking spearmint tea twice daily significantly reduced free and total testosterone levels (8, 10). An important nuance: the objective Ferriman-Gallwey score for hirsutism did not reach statistical significance in the 30-day trial - the study authors noted the duration was likely too short to see visible changes in hair growth, which follows a slow biological cycle. The androgen-lowering signal is clear; translating that into visible hair changes takes longer, which is why consistency matters.

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For Stubborn Weight & Sugar Cravings: Berberine & Chromium

If insulin resistance is driving weight gain - particularly around the abdomen - and those relentless afternoon sugar crashes, two supplements have meaningful evidence behind them.

Berberine is a plant compound that activates an enzyme called AMPK - a metabolic regulator that improves how cells take up and use glucose. Multiple randomised controlled trials and a meta-analysis comparing berberine to metformin in women with PCOS found comparable effects on insulin resistance and metabolic markers, with berberine showing particular advantages for lipid profiles (14, 15). The typical studied dose is 500mg taken 2-3 times daily before meals. Important: if you are currently taking Metformin, combining it with berberine is something to discuss with your GP first, as both have blood sugar-lowering effects and the combination warrants medical supervision.

Chromium (as chromium picolinate) supports insulin receptor sensitivity and helps blunt sharp rises in blood glucose after meals. This can meaningfully reduce the frequency and intensity of sugar cravings, which are largely driven by blood sugar instability. It works well as part of a blood sugar support protocol rather than as a standalone fix.

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For Gut Issues & Bloating: Probiotics & Synbiotics

The connection between gut health and PCOS is an emerging area of research, but what's already clear is significant: women with PCOS have measurably different gut microbiome compositions compared to women without the condition, with lower bacterial diversity and higher levels of certain pro-inflammatory species (14).

This matters because the gut microbiome plays a role in oestrogen metabolism - a community of gut bacteria (sometimes called the "estrobolome") is involved in processing and recirculating oestrogen (15). When the microbiome is disrupted, this process may be affected, potentially contributing to hormonal imbalances. The gut also influences systemic inflammation, which as we've seen is a core driver of PCOS.

Probiotic and synbiotic (probiotic + prebiotic) supplements are an emerging avenue in PCOS management. A randomised controlled trial by Karamali et al. (2018) found that synbiotic supplementation had beneficial effects on metabolic parameters in women with PCOS (16). Look for well-researched strains such as Lactobacillus acidophilus and Bifidobacterium species, and as always, third-party testing is the best quality indicator when choosing a product. This is an area where the research is actively evolving - it's worth keeping an eye on as evidence develops.

👉 To learn more about the relationship between gut health and PCOS symptoms, read our article on PCOS, gut health, and digestive issues.

At-a-Glance: PCOS Supplement Comparison

Supplement Best For Clinically Studied Dose Key Note
Inositol (40:1) Insulin resistance, irregular cycles, ovulation 4,000mg Myo + 100mg D-Chiro daily Synergistic with Vitamin D3
Omega-3 (EPA/DHA) Inflammation, high testosterone, lipid balance 1,000-3,000mg active EPA+DHA daily Check TOTOX value for quality
Vitamin D3 + K2 Metabolic health, insulin sensitivity, mood Based on blood test result Get tested first (25-OH vitamin D)
Berberine Metabolic weight, sugar cravings, insulin 500mg, 2-3x daily before meals Do NOT combine with Metformin
Zinc Acne, hirsutism, hair loss 15-30mg daily Pair with 1-2mg copper long-term

The PCOS Fertility Shortlist: Supporting Egg Quality & Ovulation

If you're trying to conceive - or simply want to support your reproductive health more broadly - two additional supplements have good evidence specifically for egg quality and ovulation.

Coenzyme Q10 (CoQ10) for Ovarian Energy

Egg development is one of the most energetically demanding processes in the body. Each developing egg (oocyte) requires enormous amounts of cellular energy to divide correctly and mature to a fertilisable state. That energy comes from the mitochondria - the tiny power generators inside every cell - and CoQ10 is a critical component of mitochondrial energy production.

As women age, CoQ10 levels naturally decline, which contributes to age-related changes in egg quality. The clinical evidence is particularly strong for women with signs of diminished ovarian reserve or those undergoing assisted reproductive treatment: a randomised controlled trial found that CoQ10 pretreatment in younger women with poor ovarian reserve resulted in more retrieved oocytes, a higher fertilisation rate, and more high-quality embryos compared to controls (11). A 2023 review further confirmed that CoQ10 may reduce chromosomal abnormalities and oocyte fragmentation, and improve mitochondrial function, particularly in women aged 31 and over (12).

For women with PCOS who are younger and without signs of diminished ovarian reserve, the evidence is promising but less definitive - CoQ10 is worth considering, especially if fertility is a priority, as part of a broader antioxidant support strategy. The most studied form is ubiquinol, which is better absorbed than standard ubiquinone, at doses of 200-600mg daily.

N-Acetyl Cysteine (NAC) for Ovulation Rates

NAC is a precursor to glutathione - the body's most powerful antioxidant. In PCOS, oxidative stress within follicular fluid is elevated, which can impair egg development and reduce ovulation rates. NAC helps neutralise this oxidative environment, creating better conditions for follicle maturation.

A systematic review and meta-analysis of 8 randomised controlled trials including 910 women with PCOS (Thakker et al., 2015) found that women taking NAC had higher odds of ovulating and achieving clinical pregnancy compared to placebo (13). The evidence on live-birth rates specifically is preliminary and the authors noted that further well-designed trials are needed to confirm this outcome. NAC may also have mild insulin-sensitising effects. Typical doses in PCOS research range from 600mg to 1,800mg daily.

👉 For a deeper dive into fertility support with PCOS, read our guide on PCOS, fertility, and trying to conceive.

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Safety First: Risks, Side Effects, and Supplement Combinations

Most supplements mentioned in this guide are well tolerated, but there are a few important safety points worth knowing - particularly if you're also on prescription medication for PCOS.

Berberine + Metformin: this combination carries a real risk of hypoglycaemia (blood sugar dropping too low). Both work via similar mechanisms to lower blood glucose, and stacking them without medical supervision is not safe. If you're on Metformin and want to explore berberine, speak to your GP first.

Metformin and Vitamin B12: if you take Metformin long-term, it gradually depletes vitamin B12 by interfering with its absorption in the gut - a well-documented interaction confirmed in the Diabetes Prevention Program Outcomes Study (19). B12 deficiency causes fatigue, nerve problems, and low mood - symptoms that overlap with PCOS symptoms and can go unnoticed. If you take Metformin, asking your GP to check your B12 level annually is worthwhile, and supplementing with an active form (methylcobalamin) is a simple addition.

A note on folate: if fertility is a goal, it's worth knowing that a significant proportion of women carry a genetic variant (MTHFR) that reduces their ability to process standard folic acid into the form the body can actually use. Methylfolate (also known as Quatrefolic or 5-MTHF) is the active, ready-to-use form that bypasses this conversion step entirely and is now the recommended form in evidence-based PCOS + fertility protocols.

Magnesium and stress/sleep: while not discussed in the main sections above, magnesium bisglycinate is a form of magnesium that is particularly well absorbed and has calming effects on the nervous system. Stress and poor sleep worsen every aspect of PCOS - elevated cortisol directly drives up androgens. Magnesium supports sleep quality and stress resilience and is frequently deficient in women with insulin resistance.

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Smart Shopping: What to Look for on a Label

What to Check Why It Matters
Third-party tested (NSF, USP, or equivalent) Confirms the product contains what it claims in the stated amounts
Explicit 40:1 ratio stated for inositol Vague "inositol blend" labels may not contain the correct ratio
No proprietary blends Exact milligram amounts must be listed - not hidden under a "blend" umbrella
Bioavailable forms (D3 not D2, methylfolate not folic acid) More absorbable forms actually reach the tissues where they're needed
TOTOX value for omega-3s Indicates oil freshness - lower is better. Rancid fish oil is counterproductive
Key terms
  • AMPK: an enzyme that acts as a metabolic master regulator, controlling how cells take up and use glucose. Berberine activates AMPK, which is one of the key mechanisms behind its insulin-sensitising effects. = AMPK: an enzyme that acts as a metabolic master regulator, controlling how cells take up and use glucose. Berberine activates AMPK, which is one of the key mechanisms behind its insulin-sensitising effects.
  • Androgen: a group of hormones - including testosterone and DHEA - that are present in all women but elevated in the majority of women with PCOS. Excess androgens are responsible for symptoms such as acne, excess facial or body hair, and thinning scalp hair. = Androgen: a group of hormones - including testosterone and DHEA - that are present in all women but elevated in the majority of women with PCOS. Excess androgens are responsible for symptoms such as acne, excess facial or body hair, and thinning scalp hair.
  • CoQ10 (Coenzyme Q10): a compound found in every cell of the body, essential for mitochondrial energy production. Supplemented to support egg quality and ovarian function, particularly in women with diminished ovarian reserve or those undergoing assisted reproductive treatment. = CoQ10 (Coenzyme Q10): a compound found in every cell of the body, essential for mitochondrial energy production. Supplemented to support egg quality and ovarian function, particularly in women with diminished ovarian reserve or those undergoing assisted reproductive treatment.
  • D-chiro-inositol (DCI): a secondary form of inositol involved in glucose metabolism. In women with PCOS, myo-inositol is over-converted into DCI too rapidly, depleting the myo-inositol that ovarian follicles need - which is why restoring the natural 40:1 ratio matters. = D-chiro-inositol (DCI): a secondary form of inositol involved in glucose metabolism. In women with PCOS, myo-inositol is over-converted into DCI too rapidly, depleting the myo-inositol that ovarian follicles need - which is why restoring the natural 40:1 ratio matters.
  • DHT (dihydrotestosterone): a potent androgen directly responsible for androgenic hair loss and excess sebum production (a key driver of hormonal acne). Produced from testosterone by the enzyme 5-alpha-reductase. = DHT (dihydrotestosterone): a potent androgen directly responsible for androgenic hair loss and excess sebum production (a key driver of hormonal acne). Produced from testosterone by the enzyme 5-alpha-reductase.
  • EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid): the two biologically active omega-3 fatty acids found in fish oil. These are the specific components with documented anti-inflammatory and anti-androgenic effects in women with PCOS, and the ones to look for on a product label rather than total fish oil volume. = EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid): the two biologically active omega-3 fatty acids found in fish oil. These are the specific components with documented anti-inflammatory and anti-androgenic effects in women with PCOS, and the ones to look for on a product label rather than total fish oil volume.
  • Estrobolome: the community of gut bacteria involved in metabolising and recirculating oestrogen in the body. Emerging research suggests the estrobolome may be disrupted in women with PCOS, potentially contributing to hormonal imbalances (15). = Estrobolome: the community of gut bacteria involved in metabolising and recirculating oestrogen in the body. Emerging research suggests the estrobolome may be disrupted in women with PCOS, potentially contributing to hormonal imbalances (15).
  • 5-alpha-reductase: an enzyme responsible for converting testosterone into its more potent form, DHT. Zinc may help moderate this enzyme's activity, which is one of the mechanisms proposed to explain its effects on androgenic hair loss and hirsutism in women with PCOS. = 5-alpha-reductase: an enzyme responsible for converting testosterone into its more potent form, DHT. Zinc may help moderate this enzyme's activity, which is one of the mechanisms proposed to explain its effects on androgenic hair loss and hirsutism in women with PCOS.
  • Folliculogenesis: the biological process by which an ovarian follicle develops from its earliest dormant stage to a mature, ovulation-ready state. This process takes approximately 85-90 days - which is why any supplement protocol needs at least three months to show its full effect (17). = Folliculogenesis: the biological process by which an ovarian follicle develops from its earliest dormant stage to a mature, ovulation-ready state. This process takes approximately 85-90 days - which is why any supplement protocol needs at least three months to show its full effect (17).
  • Hyperandrogenism: the clinical term for elevated androgen levels in the blood. In PCOS, it is most commonly expressed as acne, hirsutism (excess facial or body hair), or androgenic alopecia (hair thinning at the crown). One of the three diagnostic criteria under the Rotterdam criteria. = Hyperandrogenism: the clinical term for elevated androgen levels in the blood. In PCOS, it is most commonly expressed as acne, hirsutism (excess facial or body hair), or androgenic alopecia (hair thinning at the crown). One of the three diagnostic criteria under the Rotterdam criteria.
  • Insulin resistance: a metabolic state in which the body's cells respond less effectively to insulin, prompting the pancreas to produce increasingly higher amounts to compensate. In PCOS, the resulting excess insulin directly stimulates the ovaries to produce more androgens, creating a hormonal cascade that disrupts ovulation. = Insulin resistance: a metabolic state in which the body's cells respond less effectively to insulin, prompting the pancreas to produce increasingly higher amounts to compensate. In PCOS, the resulting excess insulin directly stimulates the ovaries to produce more androgens, creating a hormonal cascade that disrupts ovulation.
  • MTHFR: a genetic variant (methylenetetrahydrofolate reductase) that reduces the body's ability to convert standard folic acid into its active, usable form. It is common in the general population and particularly relevant for women with PCOS who are trying to conceive, as it affects folate metabolism. This is why methylfolate (Quatrefolic) is the preferred form over standard folic acid in evidence-based fertility protocols. = MTHFR: a genetic variant (methylenetetrahydrofolate reductase) that reduces the body's ability to convert standard folic acid into its active, usable form. It is common in the general population and particularly relevant for women with PCOS who are trying to conceive, as it affects folate metabolism. This is why methylfolate (Quatrefolic) is the preferred form over standard folic acid in evidence-based fertility protocols.
  • Myo-inositol: the most abundant naturally occurring form of inositol in the body. It acts as a second messenger in insulin signalling pathways and plays a particularly critical role in ovarian follicle development and egg maturation. = Myo-inositol: the most abundant naturally occurring form of inositol in the body. It acts as a second messenger in insulin signalling pathways and plays a particularly critical role in ovarian follicle development and egg maturation.
  • NAC (N-Acetyl Cysteine): a precursor to glutathione, the body's most powerful endogenous antioxidant. In PCOS, elevated oxidative stress in follicular fluid can impair egg development. NAC helps neutralise this environment and has been shown to improve ovulation and clinical pregnancy rates compared to placebo in women with PCOS (13). = NAC (N-Acetyl Cysteine): a precursor to glutathione, the body's most powerful endogenous antioxidant. In PCOS, elevated oxidative stress in follicular fluid can impair egg development. NAC helps neutralise this environment and has been shown to improve ovulation and clinical pregnancy rates compared to placebo in women with PCOS (13).
  • Rotterdam criteria: the internationally recognised diagnostic criteria for PCOS, updated in 2023. A diagnosis requires at least 2 of the following 3 features: irregular or absent ovulation, clinical or biochemical signs of hyperandrogenism, and polycystic ovarian morphology on ultrasound or elevated AMH. = Rotterdam criteria: the internationally recognised diagnostic criteria for PCOS, updated in 2023. A diagnosis requires at least 2 of the following 3 features: irregular or absent ovulation, clinical or biochemical signs of hyperandrogenism, and polycystic ovarian morphology on ultrasound or elevated AMH.
  • TOTOX value: a composite measure of oxidation in fish oil, combining primary and secondary oxidation markers. A lower TOTOX value indicates a fresher, higher-quality product - rancid fish oil is both less effective and potentially pro-inflammatory, which is the opposite of what you want. = TOTOX value: a composite measure of oxidation in fish oil, combining primary and secondary oxidation markers. A lower TOTOX value indicates a fresher, higher-quality product - rancid fish oil is both less effective and potentially pro-inflammatory, which is the opposite of what you want.

Scientific references

(1) Gambioli R. et al., "The 40:1 myo-inositol/D-chiro-inositol plasma ratio is able to restore ovulation in PCOS patients: comparison with other ratios." European Review for Medical and Pharmacological Sciences, 2019. Available at: europeanreview.org/article/18223.

(2) Teede H.J. et al., "Inositol for Polycystic Ovary Syndrome: A Systematic Review and Meta-analysis to Inform the 2023 Update of the International Evidence-based PCOS Guidelines." The Journal of Clinical Endocrinology & Metabolism, 2024. DOI: 10.1210/clinem/dgad741. PMID: 38163654.

(3) Rashidi A. et al., "The effect of myo-inositol on assisted reproductive technology outcomes in women with PCOS: A systematic review and meta-analysis." PMC, 2023. PMC: 12413536.

(4) Yuan J. et al., "Efficacy of omega-3 polyunsaturated fatty acids on hormones, oxidative stress, and inflammatory parameters among PCOS: a systematic review and meta-analysis." Annals of Palliative Medicine, 2021. Available at: apm.amegroups.org/article/view/77612/html.

(5) Vargas M.L. et al., "Effect of omega-3 fatty acids supplementation on testosterone levels in women with PCOS: Meta-analysis of randomized controlled trials." Journal of Nutritional Sciences and Dietetics, 2015. Available at: jnsd.tums.ac.ir/index.php/jnsd/article/view/35.

(6) Łagowska K. et al., "The Association Between Vitamin D and Polycystic Ovary Syndrome (PCOS) in Women: A Systematic Review." PMC, 2025. PMC: 13028899.

(7) Rahat B. et al., "Relations of Insulin Resistance, Body Weight, Vitamin D Deficiency, SHBG and Androgen Levels in PCOS Patients." PMC, 2025. PMC: 12383698.

(8) Jamilian M. et al., "Effects of Zinc Supplementation on Endocrine Outcomes in Women with PCOS: a Randomized, Double-Blind, Placebo-Controlled Trial." Biological Trace Element Research, 2016. PMID: 26315303.

(9) Maktabi M., Jamilian M., Asemi Z., "Magnesium-Zinc-Calcium-Vitamin D Co-supplementation Improves Hormonal Profiles, Biomarkers of Inflammation and Oxidative Stress in Women with PCOS." Biological Trace Element Research, 2018. PMID: 28668998.

(10) Grant P., "Spearmint herbal tea has significant anti-androgen effects in polycystic ovarian syndrome. A randomized controlled trial." Phytotherapy Research, 2010. PMID: 19585478. - And: Akdoğan M. et al., "Effect of spearmint teas on androgen levels in women with hirsutism." Phytotherapy Research, 2007. PMID: 17310494.

(11) Xu Y. et al., "Pretreatment with coenzyme Q10 improves ovarian response and embryo quality in low-prognosis young women with decreased ovarian reserve: a randomized controlled trial." Journal of Assisted Reproduction and Genetics, 2018. PMID: 29587861.

(12) Giannubilo SR. et al. / Rodriguez-Varela C. & Labarta E., "The Effect of CoQ10 supplementation on ART treatment and oocyte quality in older women." Human Fertility, 2023. PMID: 37102567.

(13) Thakker D. et al., "N-Acetylcysteine for Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Clinical Trials." Obstetrics and Gynecology International, 2015. DOI: 10.1155/2015/817849. PMC: 4306416.

(14) Guo Y. et al., "Gut microbiota in patients with polycystic ovary syndrome: a systematic review." Frontiers in Endocrinology, 2021. PMID: 34589057.

(15) Plottel CS. & Blaser MJ., "Microbiome and the estrobolome." Science Translational Medicine, 2011. PMID: 22012325.

(16) Karamali M. et al., "Effects of synbiotic supplementation on pregnancy outcomes in PCOS: a triple-masked randomised controlled trial." Probiotics and Antimicrobial Proteins, 2018. PMID: 30008185.

(17) McGee EA. & Hsueh AJW., "Initial and cyclic recruitment of ovarian follicles." Endocrine Reviews, 2000. PMID: 10724163.

(18) Li M-F. et al., "The Effect of Berberine on PCOS Patients with Insulin Resistance (PCOS-IR): A Meta-Analysis and Systematic Review." Evidence-Based Complementary and Alternative Medicine, 2018. PMC: 6261244.

(19) Aroda VR. et al., "Long-term Metformin Use and Vitamin B12 Deficiency in the Diabetes Prevention Program Outcomes Study." Journal of Clinical Endocrinology & Metabolism, 2016. PMID: 26672816.

Eva Lecoq
SOVA cofounder

Co-founder of SOVA, Eva is deeply passionate about women’s health and driven to improve the lives of women with PCOS through SOVA.

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The Hormone Balance Supplements Built for PCOS - Two Products, One Complete System

Ovastart’s clinical-dose Inositols in a convenient powder stick + Sugar Balance’s Berberine/NAC/Chromium formula for full hormonal & metabolic support. A clean, effective routine no UK supplement matches.
Helps Maintain Healthy Blood Sugar Levels
Contributes To Normal Glucose Metabolism
Helps Improve Metabolism
Helps Improve The Effects Of Insulin
225 reviews
Sugar Balance
From  £26

Berberine Supplement UK - Blood Sugar, Insulin & Metabolic Support for Women with PCOS

A targeted blend of Berberine, NAC, Chromium, Cinnamon & Gymnema to stabilise blood sugar, calm cravings, support energy after meals, and reduce inflammation. Something single-ingredient or low-dose berberine products simply can’t do.
Helps regulate hormones naturally
Cycle regularity support
Fertility & ovulation support
Supports skin & excess hair concerns
797 reviews
Ovastart
From  £32

Inositol Powder Supplement for PCOS

A full clinical dose of Myo + D-Chiro (4 g), active B-vitamins, Quatrefolic® B9 and Zinc bisglycinate. In a clean, fast-dissolving powder stick that’s gentle on your stomach.
Supports normal fertility and reproductive function
Helps regulate hormones
Helps Maintain Normal Skin
Contributes to the normal development of the foetus eyes
24 reviews

Hormone balance + essential fatty acids

Dual Inositols at clinical dose + active B-vitamins + Zinc + high-purity DHA/EPA. A uniquely complete formula for steadier hormones, fertility support, brain & heart health, and reduced fatigue.
Contributes To The Normal Functioning Of The Brain And Heart
Contribute To Normal Heart Function
Contributes to the normal development of the foetus eyes
223 reviews
Omega-3
From  £23

High-purity DHA & EPA for real hormonal support

Ultra-clean, highly absorbable omegas that support brain & heart health, fetal development, energy and inflammation. With doses far superior to standard fish oil or generic omega blends.
Helps reduce tiredness and fatigue
Helps relaxing
Contributes to normal cognitive function
Supports normal energy metabolism
Supports healthy psychological function
Supports normal muscle function
149 reviews

Highly bioavailable

Reduces tiredness, supports the nervous system and promotes relaxation. Ideal for stress, fatigue, PMS discomfort and better sleep quality.
Acts On 5 A Reductase Which Modulates Dht To Prevent Hair Loss
Improves Hair Anchorage
Reduces Damage Caused By Inflammation
Stimulates Hair Growth At The Roots
40 reviews

Hair Serum for Hair Growth

A clean, lightweight serum formulated for women’s hormonal hair challenges: with pea peptides, caffeine, biotinyl complex and soothing actives to strengthen roots, improve density, and support healthy regrowth without irritation.

Frequently asked questions

Can supplements reduce "PCOS belly" fat?

While no supplement can target fat loss in one specific area - that's simply not how the body works - the stubborn weight gain around the abdomen that many women with PCOS experience is largely driven by elevated insulin levels. Supplements like inositol that support insulin sensitivity address this underlying driver, which over time can support more balanced fat distribution throughout the body. This is slow, systemic work - and a meaningful shift in how your body regulates energy - rather than a quick fix.

What vitamins am I lacking with PCOS?

Women with PCOS are most frequently deficient inVitamin D3- between 67% and 85% of women with PCOS have insufficient levels (6). This deficiency directly worsens insulin resistance and impairs healthy follicle development. Beyond vitamin D, women on long-term Metformin are highly susceptible toVitamin B12 deficiency, which can cause chronic fatigue and nerve symptoms. Zinc, magnesium, and folate deficiencies are also common in PCOS and worth checking.

Can I take PCOS supplements while using weight-loss medications like GLP-1s (Ozempic/Wegovy)?

GLP-1 medications like semaglutide (Ozempic/Wegovy) are increasingly being used in women with PCOS, particularly for insulin resistance and weight management. They are not inherently incompatible with most supplements, but a few points matter. First, avoid doubling up on blood-sugar-lowering agents - so berberine combined with a GLP-1 should be discussed with your prescriber. Second, GLP-1 medications can reduce appetite significantly, which may reduce dietary intake of key nutrients - prioritising foundational supplements like magnesium and omega-3s becomes more important, not less. Always inform your GP or prescriber about any supplements you're taking.

How long does it take for PCOS supplements to work?

Longer than most people expect - and that's worth knowing upfront. Egg cells take approximately 90 days to fully mature through their developmental cycle (17). This means that any supplement affecting egg quality, ovulation, or hormonal balance needs at least three full months of consistent use before its effects can be meaningfully assessed. Some women notice improvements in energy, skin, or cycle regularity earlier than this, but it's worth giving any new protocol the full three-month window before evaluating results.

Do I need to take all of these supplements?

Starting with the core three (inositol, omega-3, vitamin D3) and building gradually is a much more useful approach than adding everything at once - and it makes it far easier to track what's actually working for you. Taking too many new supplements simultaneously makes it difficult to identify what's having an effect. A phased approach, tracking how you feel across cycles, is far more informative.

Are PCOS supplements safe during pregnancy?

Inositol, omega-3s, and vitamin D3 have all been studied in pregnancy and are generally considered safe - inositol in particular has a well-established safety record and may actually support pregnancy in women with PCOS. That said, always inform your midwife or obstetrician of everything you're taking once pregnant. Some supplements like berberine and NAC have less data in pregnancy and should be paused unless specifically advised otherwise by a healthcare professional.