The Role of Omega-3s in Managing PCOS Symptoms

If you have Polycystic Ovary Syndrome (PCOS), you are probably familiar with the wide range of symptoms this hormonal disorder may present. Managing its complex symptoms is an ongoing challenge for many women, and nutrition is one area where there is growing evidence for meaningful support. Omega-3 fatty acids in particular have attracted research interest in the context of PCOS (PMOS), particularly for their anti-inflammatory and insulin-sensitising properties.

An important update: On 12 May 2026, an international consensus published in The Lancet renamed Polycystic Ovary Syndrome (PCOS) to Polyendocrine Metabolic Ovarian Syndrome (PMOS). The new name reflects the condition's metabolic and inflammatory nature, both of which are central to why omega-3 fatty acids are relevant to PCOS management. Both names will be used during the transition to the 2028 ICD update. Read our explainer on what the rename means for your hormones and fertility.

What is PCOS (PMOS)?

Polycystic Ovary Syndrome (PCOS), now also referred to as Polyendocrine Metabolic Ovarian Syndrome (PMOS), is a hormonal and metabolic disorder that affects approximately 1 in 10 women of reproductive age. It may present with insulin resistance, irregular cycles, weight gain, elevated androgen levels and polycystic ovaries. Diagnosis can be challenging due to the diversity of symptoms and the fact that not all women experience all features of the condition.

The 2026 rename to PMOS was chosen specifically to reflect the metabolic and inflammatory aspects of the condition, both of which are directly relevant to the role of omega-3 fatty acids in PCOS management. Read our guide to understanding the difference between PCO, PCOS and PMOS here.

The importance of omega-3 fatty acids

Omega-3 fatty acids are a family of polyunsaturated fats with well-established roles in reducing inflammation, supporting cardiovascular health and contributing to cell membrane structure. The two forms most relevant to health outcomes are DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid), both of which are found primarily in oily fish and high-quality fish oil supplements.

In the context of PCOS (PMOS), omega-3s are of interest because chronic low-grade inflammation and insulin resistance are two of the most significant drivers of the condition's symptoms, and both may be supported by adequate omega-3 intake.

Omega-3s and hormonal balance in PCOS (PMOS)

Hormonal imbalance is a defining feature of PCOS (PMOS), with many women experiencing elevated androgens that may contribute to irregular cycles, acne and hirsutism. Research suggests omega-3 fatty acids may support hormonal regulation in women with PCOS (PMOS), potentially through their anti-inflammatory effects on the hormonal signalling pathways involved in androgen production. A 2013 randomised controlled trial published in the Journal of Obstetrics and Gynaecology Research found that omega-3 supplementation reduced testosterone levels and improved menstrual regularity in women with PCOS, though further research is needed to confirm these findings across broader populations.^[1]

Insulin resistance and PCOS (PMOS)

Insulin resistance is central to PCOS (PMOS) and is now reflected in the condition's new name. When cells do not respond adequately to insulin, it may worsen other symptoms including weight gain and hormonal imbalance through elevated insulin-driven androgen production. Research suggests omega-3 fatty acids may support improved insulin sensitivity, potentially by reducing the inflammatory processes that interfere with insulin signalling.^[1][2]

Omega-3s and inflammation in PCOS (PMOS)

Low-grade chronic inflammation is closely associated with PCOS (PMOS) and may contribute to insulin resistance and hormonal disruption. EPA and DHA are precursors to anti-inflammatory signalling molecules in the body, and regular omega-3 supplementation has well-established anti-inflammatory effects. A 2018 meta-analysis in Reproductive Biology and Endocrinology found that omega-3 supplementation significantly reduced inflammatory markers and triglycerides in women with PCOS.^[2] For more on how inflammation relates to PCOS (PMOS), watch our free webinar on low-grade inflammation and fertility here.

Weight management in PCOS (PMOS)

Weight gain is a common concern in PCOS (PMOS) and may worsen insulin resistance in a self-reinforcing cycle. Some research suggests omega-3s may support weight management by improving metabolic function and reducing inflammation, though they are unlikely to drive significant weight loss on their own. They are most useful as part of a broader dietary and lifestyle approach. Incorporating oily fish such as salmon, mackerel and sardines alongside supplementation may offer additional dietary benefit.

Choosing a quality omega-3 supplement for PCOS (PMOS)

Not all omega-3 supplements are equal. When selecting a supplement for PCOS (PMOS) management, it is worth looking for products with high concentrations of both EPA and DHA, third-party purity testing, and molecular distillation to remove contaminants including mercury.

Zita West Vital DHA

An ultra-pure, molecularly distilled omega-3 supplement providing DHA and EPA. Free from known contaminants including mercury and does not contain vitamin A, making it suitable for use when trying to conceive.

Shop Vital DHA

Omega-3s work best as part of a broader nutritional approach to PCOS (PMOS). Alongside omega-3, nutrients including inositol, NAC, folate and vitamin D each address different aspects of the condition. The Zita West PCOS Support Pack brings these together in one place.

Consulting a healthcare provider

It is important to consult a healthcare provider for diagnosis and to develop a personalised management plan for PCOS (PMOS). This may include recommendations on specific omega-3 dosages, dietary changes and other supplements suited to your individual presentation of the condition. If you would like guidance on which Zita West products may be relevant to your situation, book a free 1:1 fertility product consultation with our team.

Further reading on PCOS (PMOS)

• NAC and PCOS (PMOS) — how N-Acetyl Cysteine may support oxidative stress and insulin sensitivity
• Myo-inositol and folate for PCOS (PMOS) — evidence-based support for insulin sensitivity and ovulation
• Folate, vitamin D and PCOS (PMOS) — why these two nutrients are particularly relevant for the condition
• PCOS (PMOS) and intermittent fasting — dietary approaches for managing insulin resistance
• 12 fruits that are good for PCOS (PMOS) — practical dietary guidance for blood sugar and hormonal balance
• Free webinar: low-grade inflammation and fertility — how inflammation may affect PCOS and fertility
• PCOS has been renamed PMOS — what the new name means for your hormones and fertility

FAQs: omega-3 and PCOS (PMOS)

Can omega-3 fatty acids help with PCOS (PMOS)?

Research suggests omega-3 fatty acids may support several aspects of PCOS (PMOS) management, including reducing inflammation, improving insulin sensitivity and supporting hormonal balance. They are most effective as part of a broader nutritional and lifestyle approach rather than in isolation.

How much omega-3 should I take for PCOS (PMOS)?

The doses used in PCOS research typically range from 1g to 4g of combined EPA and DHA per day. Always consult a healthcare provider for guidance on the right dose for your individual situation. Zita West Vital DHA provides a research-aligned dose in each serving.

Is fish oil safe to take when trying to conceive with PCOS (PMOS)?

Yes, omega-3 fatty acids from fish oil are generally considered safe and beneficial when trying to conceive. It is important to choose a supplement that does not contain vitamin A, as high vitamin A intake is not recommended in early pregnancy. Zita West Vital DHA does not contain vitamin A for this reason.

Should I take omega-3 alongside other PCOS supplements?

Yes. Omega-3s address the inflammatory and metabolic aspects of PCOS (PMOS) but work best alongside other nutrients that target different mechanisms, including inositol for insulin sensitivity, NAC for oxidative stress and vitamin D for hormonal regulation. The Zita West PCOS Support Pack combines all of these in one formulation.

What is the difference between PCOS and PMOS?

PMOS (Polyendocrine Metabolic Ovarian Syndrome) is the new name for PCOS, adopted following an international consensus published in The Lancet in May 2026. The condition is the same but the new name better reflects its wider hormonal and metabolic effects. Read our full explainer on the rename.

References

1. Nadjarzadeh A et al. (2013). The effect of omega-3 supplementation on androgen profile and menstrual status in women with polycystic ovary syndrome. Journal of Obstetrics and Gynaecology Research. PubMed
2. Yang K et al. (2018). Effectiveness of omega-3 fatty acid for polycystic ovary syndrome: a systematic review and meta-analysis. Reproductive Biology and Endocrinology. PubMed

External references: NHS: Polycystic ovary syndrome (PCOS)  |  The Lancet: PMOS consensus 2026

This content is for educational purposes only and is not intended to diagnose, treat, or replace medical advice. Always consult your healthcare provider before starting any new supplement, particularly if you have a hormonal condition such as PCOS (PMOS).