Nutrition and reproductive health are closely connected. The foods you eat provide the nutrients your body uses for hormone production, egg development, and overall metabolic function. While diet alone cannot overcome all fertility challenges, research suggests that nutritional choices may support reproductive health when you’re trying to conceive after 35.
The Relationship Between Nutrition and Reproductive Health
Fertility depends on complex hormonal, metabolic, and genetic systems. Adequate nutrition supports the body’s ability to maintain these systems. Research indicates that poor nutritional status—including deficiencies in specific vitamins, minerals, and nutrients—may negatively affect egg quality, hormone balance, and overall reproductive function. Conversely, evidence suggests that adequate nutrition may support these processes.
For women over 35, nutritional support becomes increasingly relevant. Age-related changes in metabolism, declining ovarian function, and longer conception timelines mean that optimizing modifiable factors like nutrition may be especially worthwhile. Additionally, some fertility treatments involve medication side effects or increased nutritional demands that make dietary attention particularly valuable.
Nutrients Research Associates With Fertility Support
Vitamin D and Reproductive Function
Vitamin D receptors are present throughout the reproductive system, and research indicates that vitamin D plays a role in hormone regulation and ovulation. Studies suggest that women with adequate vitamin D levels may have better ovulatory function compared to those with deficiency. Additionally, evidence indicates that vitamin D may support the quality of the uterine lining.
Many women, particularly those in northern climates or with limited sun exposure, have insufficient vitamin D levels. Research suggests that having vitamin D levels checked and discussing supplementation with your healthcare provider may be valuable, especially after age 35. Some fertility specialists recommend vitamin D levels in the sufficient range when evaluating fertility concerns.
Folate, Folic Acid, and Methylfolate
Folate—the naturally occurring B vitamin found in foods—is essential for cell division and DNA synthesis. Folic acid is the synthetic form used in supplements and fortified foods. Research indicates that adequate folate is important for egg health and for early pregnancy development, where it reduces the risk of certain birth defects. Additionally, evidence suggests that methylfolate, a specific form of supplemental folate, may be beneficial for women with genetic variations affecting folate metabolism.
Public health guidelines recommend that women trying to conceive consume 400-800 mcg of folic acid daily, starting before conception. For women over 35, discussing your specific folate needs with your healthcare provider—particularly if you have a family history of neural tube defects or genetic variations affecting folate processing—can help determine the most appropriate supplementation approach.
Iron and Ovulatory Function
Iron is essential for oxygen transport and energy production throughout the body. Research indicates that iron deficiency anemia may be associated with anovulation (cycles without ovulation) and ovulatory dysfunction. Evidence suggests that adequate iron status supports normal ovulation, making iron a relevant nutrient when trying to conceive.
However, iron supplementation requires care—excess iron can be harmful. Rather than supplementing iron on your own, research suggests having your iron levels checked and discussing supplementation with your healthcare provider if deficiency is identified. For women over 35 approaching menopause, iron needs may be different than for younger women, making individualized assessment valuable.
Antioxidants: Coenzyme Q10 and Others
Coenzyme Q10 (CoQ10) is an antioxidant produced naturally in the body that plays a role in cellular energy production. Research suggests that CoQ10 may support egg quality and that levels decline with age. Some studies indicate that CoQ10 supplementation may improve egg quality and ovulation in women of reproductive age, though evidence is still emerging and studies are limited in scope.
Similarly, other antioxidants—including vitamin E, vitamin C, and selenium—play roles in protecting cells from oxidative damage. Evidence indicates that adequate antioxidant intake may support reproductive health, though most research supports obtaining these nutrients from food rather than high-dose supplementation. For women over 35 concerned about egg quality, discussing antioxidant intake and whether CoQ10 supplementation might be relevant is worth doing with your healthcare provider.
Omega-3 Fatty Acids
Omega-3 fatty acids support cardiovascular health and inflammatory balance throughout the body. Research indicates that adequate omega-3 intake may support ovulation and uterine blood flow, both relevant to conception. Evidence suggests that some women trying to conceive may benefit from including fatty fish, seeds, and other omega-3 sources in their diet.
Dietary Patterns: What Studies Indicate
Research on complete dietary patterns—rather than individual nutrients—provides additional insights. Studies indicate that patterns emphasizing whole foods, fruits, vegetables, legumes, and healthy fats (such as Mediterranean or similar patterns) may be associated with better reproductive outcomes compared to highly processed dietary patterns. Evidence suggests that minimizing added sugars, ultra-processed foods, and excessive refined carbohydrates may support fertility.
Additionally, research indicates that maintaining a stable, healthy weight through nutrition and activity can support reproductive function. For women over 35, both underweight and overweight status can affect fertility, making overall nutritional adequacy and healthy weight maintenance relevant considerations. However, research also cautions against restrictive dieting when trying to conceive, as inadequate calorie or nutrient intake can impair ovulation.
Some women find that reducing inflammatory foods—and emphasizing nutrient-dense whole foods—improves how they feel and may support their fertility journey. While individual responses to dietary changes vary, evidence suggests that moving toward whole-food-based eating patterns may benefit reproductive health.
The Importance of Discussing Supplementation With Your Provider
While many nutrients can support fertility, “more is not better” when it comes to supplementation. Some nutrients can be harmful in excessive amounts, and some supplements can interact with medications or fertility treatments. Additionally, individual nutritional needs vary based on your diet, health status, genetics, and any underlying conditions.
Research indicates that consulting with your healthcare provider or a registered dietitian before starting multiple supplements—particularly if you’re pursuing fertility treatment—ensures your supplementation plan supports your overall health and fertility goals without unintended consequences. This conversation becomes especially important after age 35, when you may have other health considerations or be using medications that affect nutrient needs or absorption.
Key Takeaways
- Adequate nutrition supports reproductive health and may optimize conditions for conception when trying to conceive after 35.
- Vitamin D, folate, iron, and antioxidants are nutrients research associates with ovulation and reproductive function.
- Dietary patterns emphasizing whole foods, fruits, vegetables, and healthy fats may support fertility better than processed-food-heavy patterns.
- Omega-3 fatty acids, found in fatty fish and seeds, may support ovulation and uterine health.
- Maintaining nutritional adequacy and healthy weight through balanced eating—rather than restriction—supports reproductive function.
- Always discuss supplementation plans with your healthcare provider before beginning, particularly when pursuing fertility treatment.
- Individual nutritional needs vary; what supports one woman’s fertility may differ from what supports another’s.
FAQ
Can supplements alone help me conceive?
Research indicates that while adequate nutrition is important for fertility, supplements cannot overcome structural problems, ovulatory disorders, or other medical causes of infertility. Supplements support overall health and may optimize conditions for conception, but they’re not substitutes for medical evaluation if you’ve been trying to conceive for a year (or six months if over 35) without success. A comprehensive fertility evaluation may reveal factors that supplements alone cannot address.
Is a specific diet guaranteed to improve fertility?
No specific diet guarantees improved fertility. Research shows that certain dietary patterns are associated with better outcomes, but individual response varies. Additionally, diet interacts with genetics, age, underlying health conditions, and other factors affecting fertility. A balanced, nutrient-dense diet supporting overall health is more evidence-based than seeking a “fertility diet” with guaranteed results.
Should I take CoQ10 if I’m over 35?
Evidence on CoQ10 for fertility is promising but still emerging. While some research suggests potential benefits for egg quality, most studies are small. Research indicates that discussing CoQ10 with your healthcare provider—particularly if you have a history of poor egg quality or are approaching fertility treatment—can help determine whether it’s appropriate for your situation. Your provider can assess your specific circumstances and ensure it won’t interact with other treatments.
Can I improve egg quality through diet?
Research indicates that adequate nutrition supports the best possible egg development from the pool of eggs available at any given time. While diet cannot change the genetic quality of individual eggs, evidence suggests that optimizing nutrition may help eggs develop under the best possible conditions. Age remains the primary factor affecting egg quality, but adequate nutritional support is part of optimizing overall reproductive health.
Do I need to follow a strict diet when trying to conceive?
Research indicates that balance and consistency matter more than perfection. Overly restrictive diets can actually impair fertility by limiting calorie and nutrient intake. Evidence suggests that aiming for a balanced diet with mostly whole foods, regular meals, and flexibility for occasional treats supports both physical health and the psychological wellness that matter for fertility. Extreme dietary restriction is not evidence-based for improving fertility and may be counterproductive.
What if I have dietary restrictions or allergies?
Research indicates that you can support fertility within various dietary frameworks—vegetarian, vegan, gluten-free, dairy-free, and others. The key is ensuring nutritional adequacy within your framework. A registered dietitian familiar with your dietary restrictions and fertility goals can help you design an approach that provides necessary nutrients. This becomes particularly valuable after age 35, when optimizing nutrition may be especially relevant to your fertility planning.
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.