Among the many questions women ask when trying to conceive after 35, “What should I eat to support my fertility?” is one of the most common — and one of the most difficult to answer with certainty. Nutrition research is inherently complex: studies are often observational, dietary patterns are hard to isolate from other lifestyle variables, and individual responses to dietary changes vary considerably. That said, a growing body of research has begun to paint a picture of eating patterns that may be associated with better fertility outcomes, particularly when considered alongside other aspects of reproductive health.
This article aims to give you an honest overview of what the evidence currently suggests, including where it is strong, where it is preliminary, and where it is genuinely uncertain. The goal is not to add to the overwhelm of fertility advice, but to offer a clearer, calmer framework for thinking about diet as one piece of the larger fertility picture — not a magic solution, but a potentially meaningful area of attention.
One framing that many reproductive specialists and registered dietitians find useful is to think of dietary choices not in terms of specific “fertility foods” but in terms of overall dietary patterns that support hormonal balance, metabolic health, and systemic inflammation — factors that are relevant to reproductive function across multiple pathways. Individual nutrients matter, but they operate within the context of an overall diet, and that overall context is where the clearest research signal tends to emerge.
The Mediterranean Dietary Pattern and Fertility
The Mediterranean dietary pattern — characterized by high intake of vegetables, fruits, whole grains, legumes, nuts, olive oil, and fish, with moderate consumption of dairy and low consumption of red and processed meat — is among the most studied dietary approaches in fertility research, and one of the few with reasonably consistent supporting evidence. Several observational studies have found associations between closer adherence to a Mediterranean-style diet and improved fertility outcomes, including in women undergoing IVF.
A study published in Human Reproduction found that women with higher Mediterranean diet scores had higher rates of clinical pregnancy and live birth in IVF cycles. Research from the EARTH study — a cohort study examining diet and fertility at a major fertility center — found similar associations, with higher adherence to a Mediterranean-style diet linked to better ovarian stimulation outcomes. While these studies are observational and cannot establish causation, the consistency of the association across multiple research groups adds weight to the pattern.
The Mediterranean dietary pattern is also associated with better insulin sensitivity, reduced systemic inflammation, and improved metabolic health — all of which are relevant to hormonal balance and ovarian function. For women trying to conceive after 35, this broader metabolic context is worth considering.
Folate and B Vitamins: Beyond Neural Tube Protection
Folate’s importance for preventing neural tube defects is widely recognized, but research has also explored its role in earlier stages of reproductive biology — including egg quality and the follicular environment. Some studies have found associations between folate intake and better embryo quality in IVF, and others have examined the role of the broader B vitamin group (including B6, B12, and riboflavin) in hormonal metabolism and fertility.
The Centers for Disease Control and Prevention recommends at least 400 micrograms of folic acid daily for women who could become pregnant, rising to 600 micrograms during pregnancy. Food sources of folate — including dark leafy greens, legumes, avocado, and fortified grains — are valuable alongside supplementation, and ensuring adequate B12 (particularly important for vegetarians and vegans, who may have lower dietary intake) is worth assessing with your healthcare provider.
The Role of Iron
Some research has examined the relationship between iron intake and ovulatory function, with findings suggesting that non-heme iron from plant sources (as opposed to heme iron from red meat) may be associated with reduced risk of ovulatory infertility. This finding, from the Nurses’ Health Study II, has been cited in discussions of fertility nutrition and remains an area of interest, though it requires further research before firm dietary recommendations can be made based on it alone.
Antioxidants and Egg Quality
Oxidative stress — an imbalance between free radicals and antioxidant defenses — has been associated with diminished egg quality, and this association becomes more relevant with age as both oxidative stress levels and the time eggs have been exposed to oxidative damage increase. Research has explored whether dietary antioxidants — including vitamins C and E, coenzyme Q10, and various plant polyphenols — can reduce oxidative damage relevant to reproductive function.
The evidence for specific antioxidant supplements in improving egg quality is still mixed and generally not strong enough to support specific supplementation recommendations outside of clinical guidance. However, a diet rich in colorful fruits and vegetables — naturally high in antioxidants — is consistently associated with positive health outcomes across multiple domains, including those relevant to hormonal and reproductive health. This is one of the areas where overall dietary pattern matters more than any single nutrient or supplement.
Insulin Sensitivity, Carbohydrate Quality, and Ovulation
Research from the Nurses’ Health Study II and other cohort studies has found associations between high-glycemic dietary patterns and ovulatory infertility. The proposed mechanism involves insulin — a diet high in rapidly digestible carbohydrates promotes higher insulin levels, which can affect ovarian androgen production and disrupt the hormonal signaling that governs ovulation. This finding has particular relevance for women with polycystic ovary syndrome (PCOS) or insulin resistance, but may also have broader application.
Replacing refined carbohydrates with whole grain alternatives, increasing dietary fiber, and minimizing added sugars are approaches that many dietitians recommend for supporting insulin sensitivity — not just for fertility, but for overall metabolic health. Individual sensitivity to dietary carbohydrate varies considerably, and for women with suspected or confirmed insulin resistance, working with a registered dietitian who can tailor recommendations to your specific metabolic profile is more useful than applying general guidance.
Foods and Patterns That Some Research Suggests May Be Worth Limiting
Several dietary patterns have been examined as potential fertility concerns, though the evidence varies in strength and consistency:
Highly processed foods: Associated with systemic inflammation and poor metabolic outcomes across multiple research areas, though specific fertility evidence is limited.
Trans fats: Some older research associated dietary trans fat intake with increased ovulatory infertility risk; trans fats have been largely eliminated from the US food supply through regulation, but may still appear in some processed products.
Alcohol: Research on alcohol and female fertility shows a dose-dependent association, with higher intake associated with longer time to conception in several studies. Most fertility specialists recommend limiting or avoiding alcohol while trying to conceive, though the threshold at which risk becomes significant is not precisely defined.
What a Fertility-Supportive Eating Pattern Might Look Like in Practice
Rather than prescribing specific foods or supplements, the research picture currently supports a dietary pattern characterized by: abundant vegetables and fruits across a range of colors, whole grains in place of refined grains, legumes and nuts as protein sources, moderate intake of fish (particularly oily fish rich in omega-3s), olive oil as a primary fat source, and limited intake of processed foods, refined sugars, and alcohol.
This is essentially a Mediterranean-style pattern — and also a pattern consistent with general evidence-based nutrition for metabolic and hormonal health. For women over 35 preparing for pregnancy, aligning eating patterns with these principles in the months before conception creates a nutritional foundation that serves both fertility and early pregnancy.
Individual adjustments — for food intolerances, existing conditions, medication interactions, or specific nutritional gaps — are best made with a registered dietitian who can assess your specific situation rather than applying generic advice.
Frequently Asked Questions
Are there specific “superfoods” that dramatically boost fertility?
The concept of a single “superfood” dramatically improving fertility is not well-supported by research. What research does support is the broader dietary pattern — a predominantly whole-food, plant-forward, Mediterranean-style approach — rather than any single food. Individual foods have value within a good overall pattern, but no single food operates as a fertility treatment.
Is caffeine safe when trying to conceive?
Research on caffeine and fertility shows mixed results, but most guidelines suggest limiting intake to under 200-300 milligrams per day while trying to conceive (roughly 1-2 cups of coffee). Higher caffeine intakes have been associated with slightly longer time to conception in some studies, though the effect size is modest and the evidence is not entirely consistent.
Should I take CoQ10 for egg quality after 35?
Coenzyme Q10 (CoQ10) is among the most discussed supplements in the context of age-related egg quality, based on its role in mitochondrial energy production. Some preliminary research in IVF populations has been promising, but the evidence is not yet strong enough for universal recommendation. This is a specific conversation to have with your reproductive specialist or OB/GYN, who can assess whether it’s appropriate given your individual circumstances.
Key Takeaways
- A Mediterranean-style dietary pattern — rich in vegetables, fruits, whole grains, legumes, and fish — is the best-supported overall dietary approach for fertility, based on multiple observational studies.
- Folate, B vitamins, and adequate iron (from varied sources) have documented relevance to reproductive health and warrant attention both before and during pregnancy.
- Antioxidant-rich eating supports the hormonal and metabolic environment relevant to egg quality, though specific antioxidant supplements require personalized clinical guidance.
- Limiting refined carbohydrates, processed foods, and alcohol aligns with both general metabolic health and fertility-specific research findings.
- Dietary changes are most effectively personalized through working with a registered dietitian alongside your fertility care team, rather than applying generic protocols.
Medical Disclaimer
This content is for informational purposes only and does not constitute medical advice. Individual health situations vary significantly. Always consult a qualified healthcare provider before making decisions related to your health, fertility, or pregnancy.
About the Author
Emily Carter is a women’s health writer focused on fertility, pregnancy after 35, and sleep changes in midlife. She writes research-informed, non-alarmist content to help women navigate reproductive and hormonal transitions with clarity and confidence.