How can I improve egg quality naturally?

How can I improve egg quality naturally?

If you have been told that egg quality is fixed and there is nothing you can do about it, the research tells a more nuanced and encouraging story. While you cannot increase the number of eggs you have, the quality of the eggs that are developing right now is meaningfully influenced by your nutritional status, lifestyle habits, and the cellular environment inside your body. And the good news is that you have approximately 90 days to influence the eggs that will be available to you in any given cycle, because that is how long the maturation process takes.

This 90-day window is one of the most important concepts in fertility nutrition. It means that what you do today has a real and measurable impact on the eggs you will be working with three months from now.

Understanding what egg quality actually means

Egg quality refers to the chromosomal and mitochondrial health of the egg. A high-quality egg has the right number of chromosomes, intact DNA, and enough cellular energy to complete fertilisation and develop into a healthy embryo. When egg quality is compromised, the result is often failed fertilisation, poor embryo development, failed implantation, or miscarriage.

The primary driver of declining egg quality is oxidative stress, which is an imbalance between free radicals and antioxidants in the body that causes cellular damage. The mitochondria inside the egg are particularly vulnerable to this damage, and since the egg contains more mitochondria than any other cell in the body, protecting mitochondrial function is central to improving egg quality.

CoQ10 and mitochondrial support

Coenzyme Q10, known as CoQ10, is one of the most well-researched nutrients for egg quality and the science behind it is compelling. CoQ10 is a fat-soluble compound found in every cell of the body, where it plays two essential roles: generating cellular energy in the mitochondria and acting as a powerful antioxidant that protects cells from oxidative damage.

The landmark research published in the journal Cell Metabolism demonstrated that the age-related decline in oocyte quality and quantity could be reversed by the administration of CoQ10 in animal models. The study showed that aging of the female germ line is accompanied by mitochondrial dysfunction, and that CoQ10 supplementation restored mitochondrial function in oocytes, normalised energy production, and reduced chromosomal abnormalities.

In human clinical research, a randomised controlled trial found that women with poor ovarian reserve who took CoQ10 prior to their IVF cycle had an increased number of retrieved oocytes, a higher fertilisation rate, more high-quality embryos, and significantly fewer cancelled cycles due to poor embryo development compared to the control group.

CoQ10 not only positively impacts egg quality and ovarian function but also enhances the developmental potential of embryos by reducing oxidative stress and enhancing mitochondrial function, which in turn supports embryo implantation and pregnancy rates. When combined with vitamin E, CoQ10 provides improved protection for oocytes against oxidative damage, and together these compounds improve the maturation rate of oocytes and the cleavage rate of embryos.

Omega-3 fatty acids

Omega-3 fatty acids, particularly DHA and EPA, are essential for cellular membrane integrity, hormone production, and reducing inflammation throughout the body, including in the ovarian environment. Research published in PMC demonstrated that a diet rich in omega-3 fatty acids maintained reproductive function at advanced maternal age and resulted in a significantly larger percentage of fully mature, healthy oocytes compared to those on standard or omega-6-dominant diets.

The Western diet provides an omega-6 to omega-3 ratio of up to 25:1, in stark contrast to the 1:1 ratio that supports optimal reproductive health. Correcting this imbalance through diet and supplementation is one of the most impactful nutritional changes you can make for egg quality.

Folate and methylfolate

Optimal folate levels are consistently associated with higher pregnancy and implantation rates. Folate supports DNA synthesis and repair, methylation processes, and the integrity of the egg's genetic material. For women with an MTHFR gene variant, the body cannot efficiently convert folic acid into its active form, making methylfolate supplementation particularly important. This is something that can be identified through functional testing and addressed with a personalised protocol.

Vitamin D

Vitamin D is far more than a bone health nutrient. It functions as a hormone in the body and plays a direct role in ovarian function, egg development, and implantation. Vitamin D deficiency is widespread among women of reproductive age and is frequently identified as an underlying factor in poor fertility outcomes. Optimal vitamin D levels, assessed through a simple blood test, are associated with improved IVF outcomes, better embryo quality, and healthier pregnancies.

Antioxidants broadly

The egg is uniquely vulnerable to oxidative damage because of its high energy demands and the long period over which it matures. A diet rich in antioxidants, including vitamins C and E, selenium, zinc, and polyphenols from colourful fruits and vegetables, helps neutralise the free radicals that damage egg DNA and mitochondrial function. Foods particularly rich in relevant antioxidants include leafy greens, berries, nuts, seeds, oily fish, and extra virgin olive oil.

Reducing what harms egg quality

Equally important is removing the factors that actively damage egg quality. These include processed foods high in trans fats and refined sugar, alcohol, smoking, environmental toxins including pesticides, plastics, and endocrine-disrupting chemicals, chronic stress, poor sleep, and excessive or insufficient exercise. Each of these factors increases oxidative stress in the body and accelerates the cellular damage that affects egg quality.

Blood sugar and insulin

Chronically elevated blood sugar and insulin resistance generate significant oxidative stress throughout the body, including in the ovarian environment. Stabilising blood sugar through low-glycaemic eating, adequate protein and healthy fats, and consistent meal timing is a foundational step in improving the cellular environment in which your eggs are developing.

What this means in practice

Improving egg quality is not about one supplement or one superfood. It is about creating an internal environment where your eggs have everything they need to mature well, divide correctly, and develop into healthy embryos. This requires a personalised approach because the specific deficiencies, imbalances, and lifestyle factors affecting your egg quality are unique to you.

A fertility nutritionist will assess your individual nutritional status, often through functional testing, and create a targeted protocol that addresses your specific needs in the 90-day window before you are trying to conceive or beginning an IVF cycle.

The bottom line

Your egg quality is not entirely fixed. While age is a real factor, the nutritional and lifestyle environment in which your eggs are maturing is highly modifiable, and the evidence supporting targeted intervention is both robust and growing. Starting at least three months before you plan to conceive, or before an IVF cycle, gives you the best opportunity to influence the quality of the eggs that matter most.

Sources: PMC Cell Metabolism (CoQ10 restores oocyte mitochondrial function, Ben-Meir et al.); PMC randomised controlled trial (CoQ10 pretreatment and ovarian response in poor responders); Frontiers in Cell and Developmental Biology 2025 (protective effects of CoQ10 on female fertility); PMC (omega-3 fatty acids and egg quality, reproductive lifespan); IFN Academy 2025 (preconception micronutrient optimisation and embryo quality); Fertility Centers of Illinois; Illume Fertility 2024 (CoQ10 and fertility); Zita West 2026 (mitochondria and ubiquinol CoQ10).