Male Fertility Nutrition: What He Should Be Eating

This article is part of the Nella Vosk Fertility Nutrition & Natural Conception Support: Complete Guide for Australian Couples — the comprehensive resource for Australian couples preparing for pregnancy. This article answers one specific question: what should a man eat to support sperm quality and reproductive health in the months before trying to conceive?

When couples are trying to conceive, the nutritional conversation almost always centres on the woman. Folate, iron, preconception vitamins, hormone balance — all genuinely important. But here’s the part that often goes unspoken: male fertility contributes to approximately half of all conception challenges. And nutrition has a measurable, evidence-supported impact on sperm quality.

At Nella Vosk, supporting both partners through the preconception journey sits at the heart of our Maternal Foundation pathway — because the nutritional foundation for a healthy pregnancy begins with both of you, not just one.

The good news for men is that the biology is actually quite motivating. Sperm have a lifespan of around 90 days from production to ejaculation. That means two to three months of focused, consistent nutrition can meaningfully influence the sperm available when conception is attempted. You don’t need a perfect diet overnight — you need a better diet, sustained.

This guide covers the key nutrients that matter, the foods that deliver them, the dietary patterns associated with better sperm parameters, and the common habits worth reconsidering.

Sperm quality is assessed across four main parameters: count (how many), concentration (density), motility (how well they swim), and morphology (their shape). Research consistently shows that diet influences all four — and that oxidative stress is the key mechanism.

Oxidative stress occurs when free radicals — unstable molecules generated by normal metabolism, processed food, alcohol, smoking, heat, and environmental toxins — damage sperm cells, including their DNA. Sperm are particularly vulnerable to oxidative damage because they carry relatively little protective antioxidant capacity of their own.

Diet provides the antioxidants, co-factors, and structural building blocks that protect sperm from oxidative damage and support the entire spermatogenesis process. This is why what a man eats in the three months before conception genuinely matters — and why the 90-day window is the frame to work within.

Zinc

Zinc is arguably the most important mineral for male reproductive health. It plays a direct role in testosterone synthesis, sperm production, and sperm motility. Research consistently shows that men with sub-fertility or infertility have lower zinc levels in seminal fluid, and that better zinc status is associated with improved sperm count and motility.

Australian men with high alcohol intake, poor dietary variety, or high-stress lifestyles are at particular risk of inadequate zinc. The recommended dietary intake for adult men is 14mg per day.

Best food sources: oysters (the highest zinc food source by far), red meat, legumes, pumpkin seeds, cashews, eggs.

Selenium

Selenium is a potent antioxidant mineral that helps protect sperm DNA from oxidative damage. It is also required for the production of selenoproteins, which are involved in sperm maturation and motility. Research has linked low selenium status with impaired sperm motility and increased DNA fragmentation.

Best food sources: Brazil nuts (two to three per day provide the recommended intake), tuna, salmon, sardines, eggs, chicken.

Folate

Folate is typically discussed in the context of women’s preconception health, but it matters for men too. Folate deficiency is associated with increased DNA fragmentation in sperm — meaning the genetic information sperm carry is more likely to be damaged. A 2008 study published in Human Reproduction found that higher folate intake was associated with lower rates of sperm DNA damage.

Best food sources: dark leafy vegetables (spinach, kale, rocket), legumes, fortified cereals, broccoli, asparagus, Brussels sprouts.

Omega-3 Fatty Acids

Omega-3 fatty acids are essential structural components of sperm cell membranes. They support sperm motility, morphology, and concentration — and have strong anti-inflammatory properties that reduce the oxidative load on reproductive tissue. Research published in Andrology found that men with higher omega-3 intake had better sperm count, concentration, and motility.

Best food sources: oily fish (salmon, mackerel, sardines, trout) two to three times per week. Walnuts, flaxseed, and chia seeds provide plant-based ALA omega-3 (less directly bioavailable but still contributing).

CoQ10 (Coenzyme Q10)

CoQ10 is a naturally occurring antioxidant that is found in high concentrations in sperm. It plays a role in sperm energy production (sperm need significant energy to swim) and protects against oxidative damage. Research has found that CoQ10 supplementation may support sperm count and motility, particularly in men with established fertility challenges.

While food sources of CoQ10 include organ meats, oily fish, and beef, the amounts from diet alone are modest. CoQ10 supplementation (typically 100–300mg per day) is one of the more evidence-supported male fertility supplements — worth discussing with a GP or integrative practitioner.

Best food sources: organ meats (liver, kidney), oily fish, beef, soy, spinach, broccoli.

Vitamin D

Vitamin D receptors are found on sperm, and vitamin D deficiency has been associated with reduced sperm motility and lower testosterone levels. Many Australian men — despite the climate — have inadequate vitamin D levels, particularly those who work indoors. A 2011 study in Human Reproduction found significant correlations between vitamin D status and sperm motility in healthy Danish men.

Best food sources: oily fish, eggs, fortified foods. Sun exposure is the primary source — but a GP check of vitamin D status (serum 25-hydroxyvitamin D) before supplementing is recommended.

Vitamin C

Vitamin C is a water-soluble antioxidant present in high concentrations in seminal fluid. It protects sperm from oxidative damage and is associated with improved sperm count and motility. Smokers have particularly depleted vitamin C and require significantly higher intake.

Best food sources: capsicum (the highest food source), citrus fruits, kiwifruit, strawberries, broccoli, mango.

Nutritional improvement is a meaningful and evidence-based approach to supporting male fertility — but it is not a substitute for medical evaluation if there are concerns about fertility. Semen analysis is a relatively straightforward investigation that provides concrete information about sperm count, motility, and morphology. If you have been trying to conceive without success for twelve months (or six months if the female partner is over 35), speak with a GP about a referral for semen analysis alongside an assessment of female fertility factors.

Nutrition is most powerful as a foundation — it creates the best possible environment for sperm health. Where medical factors are present, it complements rather than replaces clinical care.