PMOS (PCOS) Fertility Supplements: Where to Start and How to Build a Safe Routine

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 what we now understand about the condition's wider hormonal effects. 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.

Last updated 18 August 2026.

Nutrition and supplements are intended to support overall hormonal and reproductive wellbeing as part of a wider lifestyle approach. They are not a treatment, cure or guarantee of ovulation or pregnancy.

If you have PMOS (PCOS) and you're trying to conceive, it's easy to feel overwhelmed by the sheer number of nutrients that come up in conversation: inositol, folate, vitamin D, NAC, omega-3, fibre, gut health. Each one is discussed for a reason, but working out which matter for you, and how they fit together, can feel like a research project on top of everything else you're managing.

This article explains which nutrients are commonly recommended for PMOS when trying to conceive, why each one is relevant, and how they relate to one another. For a broader overview of PMOS, its effect on fertility and the support options available, visit our PMOS fertility support hub.

Supplements cannot treat or cure PMOS (PCOS), and they cannot guarantee ovulation or pregnancy. They are best thought of as one part of a broader approach that also includes diet, lifestyle and appropriate clinical care.

What supplements are commonly recommended for PMOS (PCOS) when trying to conceive?

Nutrients commonly discussed in PMOS fertility nutrition include myo-inositol, vitamin D, NAC, omega-3, a fertility multivitamin, gut support and fibre. Together, these target the areas PMOS most often affects: insulin sensitivity, ovulation, hormone balance, antioxidant status, gut health and inflammation.

• Myo-inositol: supports insulin sensitivity and ovarian function
• Vitamin D: commonly low in women with PMOS; relevant to hormone health and cycle regularity.
• NAC (N-Acetyl Cysteine): a glutathione precursor, relevant to antioxidant status and metabolic health.
• Omega-3 (DHA and EPA): supports inflammatory balance, cell structure and hormone pathways.
• Fertility multivitamin: provides a broad nutritional base, including active folate, for preconception.
• Gut support: increasingly recognised as relevant to hormonal wellbeing and nutrient absorption.
• Fibre (psyllium husk): supports blood sugar balance, which is closely tied to insulin sensitivity in PMOS.

Myo-inositol and folate: the foundation of PMOS fertility nutrition

Myo-inositol is one of the most studied nutrients for PCOS, relevant because insulin resistance is a common metabolic feature of PMOS. Folate is an essential preconception nutrient for all women trying to conceive, recommended by the NHS. The Zita West Inositol and Folate product combines both using Quatrefolic methylfolate.

Myo-inositol is widely discussed in relation to inositol and insulin resistance in PCOS, because insulin signalling is closely linked to ovarian function in PMOS. The 2023 international PCOS guideline notes that inositol may be considered according to individual preferences.¹

Folate, meanwhile, is recommended for all women trying to conceive, regardless of PMOS status, because of its role in cell division and neural tube development in early pregnancy. Our guide on folate covers this in more depth. The Zita West Inositol and Folate product brings both nutrients together in one formula, using Quatrefolic methylfolate rather than folic acid.

When taken as part of the PMOS Support Pack alongside Vitafem, the folate levels across both products have been considered together by our nutrition team. You do not need to worry about duplicating nutrients within the pack.

Inositol and Folate

Combines myo-inositol with Quatrefolic methylfolate, formulated with PMOS and irregular ovulation in mind. Designed to be taken alongside, not instead of, a foundation multivitamin.

Shop Inositol and Folate

Vitamin D, NAC, omega-3 and gut health: why PMOS needs a broader approach

Beyond inositol and folate, PMOS is commonly discussed alongside several other nutritional considerations: vitamin D status, oxidative stress, inflammatory balance and gut health. Each of the areas below plays a different role, and not every nutrient will be equally relevant to every woman.

Vitamin D

Low vitamin D is common in women with PMOS. It's relevant to hormone health, immune function and menstrual cycle regularity.

Vitamin D status is worth reviewing as part of a PMOS routine, ideally alongside a blood test or GP advice, since individual requirements vary. Our guide on folate, vitamin D and PCOS covers this in more detail, and NHS guidance recommends most adults consider a daily vitamin D supplement, particularly in autumn and winter.²

N-Acetyl Cysteine (NAC)

NAC is a glutathione precursor. It addresses oxidative stress and metabolic health, both commonly elevated in PCOS.

A number of clinical studies have looked at NAC in women with PCOS, including its relationship to insulin sensitivity and metabolic markers.³ Our guide on NAC and PCOS explains the research in more depth.

N-Acetyl Cysteine (NAC)

A glutathione precursor commonly reviewed by women with PMOS as part of a broader approach to antioxidant status and metabolic health.

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Omega-3 fatty acids

DHA and EPA are relevant to inflammatory balance, cell structure and hormone pathways.

Omega-3s are discussed in relation to managing PCOS symptoms, particularly where inflammation is a consideration alongside insulin resistance. Ultra Omega is a fish-sourced option providing both EPA and DHA for women reviewing their omega-3 intake as part of a PMOS routine.

Psyllium husk and fibre

Psyllium husk is included in the PMOS pack specifically because of research around its role in supporting blood sugar balance and insulin resistance, both central to PCOS and PMOS management.

Adequate dietary fibre supports gut function, slows glucose absorption and may help moderate the blood sugar fluctuations associated with insulin resistance in PCOS. A trial of high dietary fibre intake in people with type 2 diabetes reported improvements in glycaemic and lipid markers, which is part of why fibre is discussed in this context.⁴

Psyllium Husk

A gentle fibre supplement included in the PMOS pack for its relevance to blood sugar balance and digestive function.

Shop Psyllium Husk

Femceive and the gut and vaginal microbiome

Femceive is included in the PMOS Support Pack to support the gut and vaginal microbiome. These areas are relevant to nutrient absorption, immune function and hormonal wellbeing, which can all form part of a wider PMOS fertility plan.

Explore Femceive

Is it safe to take multiple supplements for PMOS at the same time?

Yes. The Zita West PMOS (PCOS) Support Pack was formulated by our in-house nutrition team specifically for women managing PMOS. Every product in the pack is designed to be taken together. There are no interactions between the supplements.

If you're adding supplements from other brands to your routine, or already take prescribed medication such as metformin, it's worth checking with a GP or pharmacist first, or booking a free 1:1 product consultation with our team so we can review your full routine together.

There are no interactions between the supplements in the Zita West PMOS Support Pack. You can take them in any order that suits your routine, ideally with meals.

What if I prefer to build my routine product by product?

Some women prefer to start with one or two products and build up gradually, rather than beginning with the full pack. This is a reasonable approach, particularly if you're already taking some of these nutrients. You can explore the individual products in our PMOS supplement range and add to your routine as feels right for you.

The Zita West PMOS (PCOS) Support Pack: what is included and why

The pack is one month's supply, with the exception of the Vitamin D spray which provides three months. All products are designed to be taken together.

Explore the PMOS (PCOS) Support Pack

Frequently asked questions

I have PCOS and I'm not sure where to start with supplements. What should I do?

The clearest starting point is myo-inositol with folate, vitamin D and a fertility multivitamin. These cover the most commonly discussed nutritional gaps in PMOS. The Zita West PMOS Support Pack brings all of these together in a single expert-curated routine. If you're unsure, book a free 1:1 consultation.

How can I choose a PCOS fertility supplement without duplicating nutrients?

If you're using the Zita West PMOS Support Pack, this has already been considered for you. The pack was formulated so all products work together without problematic overlap. If you're adding supplements from other brands, check with a healthcare professional or book a consultation with our team.

What is the difference between PCOS and PMOS?

PMOS and PCOS refer to the same condition. PMOS is the updated clinical name introduced in 2026. Both names will be used until 2028, and the nutritional approach discussed here is the same regardless of which name you see used. Read more in our guide on why PCOS has been renamed PMOS.

Can PMOS affect fertility?

Yes. PMOS can disrupt ovulation, which may make it harder to identify fertile days and can extend the time it takes to conceive. Not all women with PMOS find it difficult to conceive. If you've been trying for 12 months, or 6 months if you're over 35, speak to your GP.

Is inositol useful for PCOS fertility support?

Yes. Myo-inositol is one of the most widely discussed nutrients for PCOS and PMOS because of its role in insulin signalling and ovarian function. The 2023 international PCOS guideline notes it may be considered according to individual preferences.¹

Should I speak to my GP before starting PMOS supplements?

Yes, particularly if you take prescribed medication such as metformin, or are preparing for IVF. For general preconception support without a complex medical background, a free 1:1 consultation with a Zita West nutritionist is a helpful first step.

Next steps

• Ready for a complete routine? Explore the PMOS (PCOS) Support Pack.
• Prefer to build product by product? Browse the PMOS supplement range.
• Not sure where to start? Book a free 1:1 product consultation.
• Want to understand PMOS and fertility more broadly? Read female fertility foundations.

Supplements are not a treatment for PMOS (PCOS) and do not guarantee ovulation or pregnancy. They are most effective when chosen thoughtfully and used alongside appropriate nutrition, lifestyle and clinical care.

References

1. Teede HJ, Tay CT, Lujan ME, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. Journal of Clinical Endocrinology and Metabolism. 2023;108(10):2447-2469. https://academic.oup.com/jcem/article/108/10/2447/7242360
2. NHS. Vitamins and minerals: Vitamin D. https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/
3. Thakker D, Raval A, Patel I, Walia R. N-acetylcysteine for polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled clinical trials. Obstetrics and Gynecology International. 2015;2015:817849. https://pubmed.ncbi.nlm.nih.gov/25653680/
4. Chandalia M, Garg A, Lutjohann D, et al. Beneficial effects of high dietary fiber intake in patients with type 2 diabetes mellitus. New England Journal of Medicine. 2000;342(19):1392-1398. https://pubmed.ncbi.nlm.nih.gov/10805824/
5. NHS. Folic acid. https://www.nhs.uk/medicines/folic-acid/
6. Teede HJ, Khomami MB, Morman R, et al. Polyendocrine metabolic ovarian syndrome, the new name for polycystic ovary syndrome. The Lancet. 2026;407(10545):2329-2339. https://pubmed.ncbi.nlm.nih.gov/42119588/

Medical disclaimer: this article is for general information and does not replace personal advice from a GP, midwife, fertility clinic or qualified healthcare practitioner, especially if you are pregnant, breastfeeding, taking medication or undergoing fertility treatment.

Further reading

• The Benefits of Inositol for Fertility
• NAC and PCOS: How N-Acetylcysteine Can Benefit Women with PCOS
• Folate, Vitamin D, and PCOS