Top 10 Fertility Supplements to Boost Your Chances of Conceiving

If you've been exploring ways to support your fertility, you've probably noticed just how many supplements are out there — and wondered which ones are actually worth taking. You're not alone. The truth is, nutrition and supplementation can play a meaningful role in reproductive health, especially when paired with medical care and healthy lifestyle habits. We've gone through the research to bring you the 10 fertility supplements with the strongest evidence behind them, so you can feel more confident about the choices you're making.

Important disclaimer: This information is educational and does not replace professional medical advice. Always consult with your healthcare provider or fertility specialist before starting any supplement regimen, as some supplements may interact with medications or affect fertility treatments.

What Does the Research Actually Say About Fertility Supplements?

We know it can feel overwhelming when every supplement brand promises the world. So let's cut through the noise together and look at where the evidence is genuinely strong — and where it's still catching up. Understanding this can help you have a more productive conversation with your healthcare provider, who can assess your individual needs and flag any potential interactions with medications you may be taking.

How Strong Is the Evidence for Each Supplement?

Here's the honest picture for you: not all fertility supplements have equal backing in the research. Folic acid stands on the firmest ground, with decades of large-scale studies confirming its role in preventing neural tube defects and supporting your ovulatory health.¹ CoQ10 has built up impressive support from clinical trials too, particularly for women over 35 — studies in Fertility and Sterility and related journals suggest CoQ10 supplementation may support egg quality markers, particularly in women over 35; results in IVF cohorts have been mixed and larger trials are ongoing.² Vitamin D and zinc are backed by consistent data linking deficiency to poorer reproductive outcomes in both sexes, though interventional trials continue to evolve.^4,6

On the other hand, supplements like maca root have mostly been studied in small-scale trials or animal models.⁷ The picture for L-arginine is mixed: some studies in IVF contexts report improvements in uterine blood flow and pregnancy outcomes, while earlier research found less consistent results.⁸ The science here is still developing, which is worth keeping in mind as you weigh your options.

Where Does the Research Disagree?

Inositol is an interesting one for you to understand. For women with PCOS, the evidence is genuinely encouraging — multiple randomised controlled trials support its role in improving insulin sensitivity and ovulatory function.⁵ But for women without PCOS, the benefits are less clear, and recent guidelines note that inositol is not recommended as a standalone first-line treatment for ovulation induction in PCOS patients when compared to established pharmacological agents.

There's also an ongoing conversation about the best form of CoQ10 for you. Some practitioners lean toward ubiquinol (the reduced form) for potentially higher bioavailability, while others point out that ubiquinone (the standard form) has been used in most clinical trials. Honestly, the research hasn't definitively settled this one yet, so your fertility specialist's input is worth seeking.

NAC is another supplement worth understanding in context. Its antioxidant properties are well established, and studies in women with PCOS show encouraging results when combined with clomiphene citrate.¹⁰ That said, NAC should not be considered a first-line treatment for PCOS. If you are taking metformin, note that inositol may have additive effects on insulin sensitivity — discuss combined use with your doctor or general fertility, and evidence for NAC as a standalone fertility supplement in the general population remains limited.

Ranking Supplements by Evidence Strength

If you're trying to figure out where to start, here's a helpful way to think about it based on the current evidence:

• Strongest evidence: Folic acid, CoQ10, vitamin D, zinc—supported by multiple clinical trials and widely recommended by fertility specialists.
• Good evidence for specific populations: Inositol (particularly for PCOS), omega-3 fatty acids, selenium—solid data in targeted groups, with broader benefits still being studied.
• Emerging or limited evidence: Maca root, L-arginine, NAC—promising early findings, but larger, well-designed human trials are needed to confirm specific fertility benefits.

Just because a supplement sits in the "emerging" category doesn't mean it won't help — it means the science is still working to catch up. The best next step is to talk through your individual situation with your healthcare provider so you can figure out which combination makes the most sense for you, particularly if you're also taking fertility medications.

1. How Does Folic Acid Support Fertility?

If there's one supplement that virtually every fertility specialist agrees on, it's folic acid. This essential B-vitamin plays a key role in DNA synthesis and repair, making it vital for cell division and growth. For women trying to conceive, folic acid is especially important because it helps prevent neural tube defects in the developing fetus.¹ On top of that, adequate folic acid levels support healthy egg production and may reduce the risk of ovulatory infertility. Note: While routine MTHFR gene testing is not recommended by the American College of Medical Genetics, some individuals may benefit from methylfolate forms of folate based on specific metabolic needs or clinical factors. Discuss your individual situation with your healthcare provider if you have a history of miscarriage or family history of neural tube defects.

2. How Does CoQ10 Improve Egg and Sperm Quality?

This is one we get asked about a lot — and for good reason. Coenzyme Q10 is an antioxidant that plays a central role in how your cells produce energy. It's particularly helpful for supporting egg quality, especially for women over 35. Here's why that matters: CoQ10 levels naturally decline as we age, which can affect egg quality. Supplementing may help maintain those levels, potentially giving your eggs the energy support they need. Clinical trials suggest benefits primarily in women undergoing IVF, particularly those with diminished ovarian reserve.² As with all supplements, discuss dosing and duration with your fertility specialist.

3. How Do Omega-3 Fatty Acids Benefit Reproductive Health?

You've probably heard about omega-3s for heart and brain health, but they deserve a spot on your fertility radar too. Omega-3 fatty acids, particularly EPA and DHA, are essential fats that play a meaningful role in reproductive health. Research suggests they may help regulate hormone levels, calm inflammation, and improve blood flow to the reproductive organs.³ They're also considered important for healthy pregnancy development. Make sure your supplement provides adequate DHA (minimum 200 mg for pregnancy support), and talk with your healthcare provider about the right dose range for you.

4. Why Is Vitamin D Important for Fertility?

Think of vitamin D as a behind-the-scenes player that quietly influences a lot of what matters for fertility. This fat-soluble vitamin is critical for bone health, immune function, and reproductive health. Studies link vitamin D deficiency to fertility problems, including irregular menstrual cycles, ovulatory disorders, and variable success rates in assisted reproductive technologies.⁴ Before you supplement, ask your healthcare provider to test your vitamin D levels—that result lets them recommend the right dose for you. You'll likely benefit from 1,000–4,000 IU daily, but if you're deficient you may need higher doses initially. Retest after supplementing to confirm you've reached adequate levels.

5. How Does Inositol Help with PCOS and Fertility?

If you're navigating PCOS, this one's especially worth knowing about. Inositol, particularly myo-inositol and D-chiro-inositol, is a type of sugar that plays a key role in insulin regulation. It's especially helpful for women with polycystic ovary syndrome (PCOS) because it helps improve insulin sensitivity, may regulate menstrual cycles, and supports ovulatory function.⁵ However, recent guidelines clarify that inositol is not recommended as a standalone first-line treatment for ovulation induction in PCOS and may work best as part of a comprehensive treatment plan. Have a conversation with your fertility specialist about whether inositol fits your situation and how it might complement other treatments you're considering.

6. How Does Zinc Support Reproductive Health?

Zinc is one of those nutrients that doesn't always get the spotlight, but it's doing important work for both partners. This trace mineral is essential for immune function, DNA synthesis, and cell division — all of which matter for reproductive health. When your zinc levels drop too low, hormonal imbalances and reduced sperm quality can follow.⁶ Supplementing at the right dose helps support healthy hormone levels and reproductive function. Keep one thing in mind: excess zinc interferes with copper absorption and interacts with certain antibiotics, so stay within recommended doses and tell your healthcare provider you're taking it.

7. What Does Research Show About Maca Root and Fertility?

Maca root is one you'll see mentioned often in fertility communities, and we want to be upfront about where the evidence stands. This Andean plant is frequently marketed for fertility enhancement, but researchers have primarily looked at libido and sexual function rather than direct fertility outcomes. The studies we have are small-scale, and the results aren't conclusive yet. Some research does suggest potential benefits for sperm quality in healthy men, but you'll want to see larger, well-designed human trials before calling it an established fertility treatment.⁷ It's one to keep an eye on as the science progresses.

8. What Does Research Show About L-Arginine for Fertility?

L-arginine is an amino acid that helps your body produce nitric oxide, a compound that relaxes blood vessels. Some research suggests it may improve uterine blood flow in specific situations, such as IVF poor responders.⁸ However, the evidence is mixed — some studies show benefits while others found no significant effect on conception rates. Think of it as an adjunctive option in certain fertility contexts rather than a first-line treatment. If you're curious about whether it might be right for your situation, your fertility specialist can help you weigh the pros and cons.

9. How Does Selenium Protect Reproductive Cells?

Selenium is a quiet workhorse for reproductive health. This trace element acts as an antioxidant, helping protect your cells from oxidative stress. It's particularly valuable for sperm quality, supporting sperm DNA integrity and motility.⁹ For women, selenium supports a healthy thyroid, which is crucial for hormonal balance and fertility. Important: selenium has a narrow therapeutic window—stay within recommended doses (55–100 mcg daily) to avoid toxicity risk, which rises above 400 mcg. Tell your healthcare provider you're taking selenium, especially if you also take thyroid medications.

10. What Does Research Show About NAC for Fertility?

NAC (N-Acetyl Cysteine) is an antioxidant that supports cellular function and helps reduce oxidative stress. For women with PCOS, there's some genuinely encouraging data — studies show positive results when NAC is combined with clomiphene citrate for ovulation induction.¹⁰ That said, it's important to know that NAC should not be considered a first-line treatment for PCOS. If you are taking metformin, note that inositol may have additive effects on insulin sensitivity — discuss combined use with your doctor or general fertility issues. The evidence for NAC as a standalone fertility supplement in the general population is still limited, and more research is needed. If NAC is on your radar, talk with your fertility specialist about whether it's a good fit for your situation and how it coordinates with any medications you're taking.

Supplement-Medication Interactions: Important Safety Information

This is something we really want you to be aware of: some fertility supplements may interact with fertility medications or other treatments. For example, high-dose vitamin E, fish oil, and certain herbal supplements can increase bleeding risk if combined with blood thinners. St. John's Wort may reduce the effectiveness of some fertility drugs. Before you start any supplement regimen, hand your fertility specialist a complete list of everything you're considering. That single step makes a real difference in keeping your treatment plan safe and on track.

What Is the Best Approach to Fertility Supplementation?

Here's what we always come back to: fertility is deeply personal, and there's no one-size-fits-all answer. Age, lifestyle, and underlying health conditions all play a role. While the right supplements can genuinely support your reproductive health, they work best as one piece of a bigger picture that includes medical care, appropriate testing, and taking care of yourself day to day. Before you start any new regimen, talk to your healthcare provider or fertility specialist — they'll help you build a plan tailored to your needs and check that nothing conflicts with medications or treatments you're already using.

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This article and any products discussed are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare provider before using any supplements.

References

1. American College of Obstetricians and Gynecologists (ACOG). Folic Acid Supplementation. https://www.acog.org/womens-health/faqs/folic-acid-supplementation.
2. Bentov, Y., et al. Coenzyme Q10 Supplementation and Ovarian Response in Older Women Undergoing IVF. Fertility and Sterility, 2014. https://www.fertstert.org/article/S0015-0282(09)00787-8/fulltext.
3. Hammiche, F., et al. Omega-3 Fatty Acid Intake and Embryo Morphology During IVF. Fertility and Sterility, 2011. https://academic.oup.com/ajcn/article/94/3/884/4597910.
4. Chu, J., et al. Vitamin D and Reproductive Health: A Meta-Analysis. Human Reproduction, 2018. https://academic.oup.com/humrep/article/103/6/2102/4990256.
5. Nestler, J.E., et al. Inositol and Ovarian Function in Women with PCOS. The New England Journal of Medicine, 1999. https://www.nejm.org/doi/full/10.1056/NEJM199904293401703/2865113.
6. Fallah, A., et al. Zinc Supplementation and Sperm Quality in Subfertile Men. Journal of Reproduction & Infertility, 2018. https://rbej.biomedcentral.com/articles/10.1186/s12958-018-0439-0.
7. Gonzales, G.F. Maca Root and Reproductive Health. Evidence-Based Complementary and Alternative Medicine, 2012. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3184420/.
8. Battaglia, C., et al. L-Arginine Supplementation and Uterine Blood Flow. Human Reproduction, 1999. https://www.fertstert.org/article/S0015-0282(00)00234-2/fulltext.
9. Moslemi, M.K., et al. Selenium Supplementation and Sperm Quality. International Journal of General Medicine, 2011. https://doi.org/10.2147/IJGM.S16275.
10. Fulghesu, A.M., et al. N-Acetyl Cysteine and Ovulation in Women with PCOS. Fertility and Sterility, 2002. https://www.pubmed.ncbi.nlm.nih.gov/15681218.

Marina Carter

Health Writer at FertilitySmart

Marina Carter is a specialist health writer with experience in reproductive health, fertility nutrition, and evidence-based conception support. She focuses on translating peer-reviewed research into practical guidance for individuals and couples on their fertility journey. All FertilitySmart articles are reviewed for medical accuracy. Read full bio →