Best 10 Vitamins to Increase Healthy Sperm Volume in 2026

If you and your partner are trying to conceive, male fertility clinic matters as much as female fertility. Sperm health, which covers count, motility (how well sperm move), morphology (their shape), and DNA integrity, contributes to around half of all fertility challenges a couple faces.

The good news is that sperm are regenerated roughly every 74 days. That means changes you make today, including targeted nutrition and supplementation, can meaningfully improve sperm quality within three months.

This guide covers the 10 most evidence-backed vitamins and nutrients for healthy sperm in 2026, what the research actually shows, and how to use them sensibly. If you are concerned about male fertility, seeking a professional assessment from a specialist clinic such as myGynaePlus is a good starting point before investing in supplements.

What Makes Sperm "Healthy"?

Before reaching for supplements, it helps to understand what doctors look for in a semen analysis. Healthy sperm requires:

• Count: At least 16 million sperm per millilitre, or 39 million total per ejaculate (WHO 2021 reference values)

• Motility: At least 42% of sperm should move, with 30% showing progressive movement

• Morphology: At least 4% of sperm should have a normal shape

• DNA integrity: Low levels of DNA fragmentation for successful fertilisation and healthy embryo development

Oxidative stress, nutritional deficiencies, and inflammation are among the most common correctable causes of poor sperm quality. This is where vitamins and antioxidants come in.

1. Zinc: The Cornerstone Mineral for Sperm Production

Zinc is one of the most studied nutrients in male fertility. It plays a direct role in testosterone production, spermatogenesis (the creation of sperm cells), and sperm motility.

The testes contain one of the highest concentrations of zinc in the male body. Deficiency reduces testosterone levels and lowers sperm count.

A study of subfertile men receiving zinc sulphate supplementation showed a measurable increase in sperm concentration. Research published by CNY Fertility cites approximately 18.5 million sperm per millilitre gained compared to baseline. A systematic review and meta-analysis published in the Reproductive BioMedicine Online journal found that zinc combined with folic acid improved sperm parameters in infertile men.

Typical research dose: 25 to 66 mg per day 

Food sources: Oysters, beef, pumpkin seeds, lentils, chickpeas

2. Coenzyme Q10 (CoQ10): The Antioxidant Powerhouse

CoQ10 is a naturally occurring antioxidant found in every cell of the body, including sperm cells. It protects sperm from oxidative damage and plays a role in energy production within sperm mitochondria, which directly affects how well sperm swim.

A 2025 analysis of nine randomised controlled trials involving 781 men with idiopathic male infertility found that CoQ10 supplementation significantly increased average sperm concentration by approximately 10.22 million sperm per millilitre compared to placebo, according to research reviewed by CNY Fertility. A further systematic review of antioxidant supplementation, published in PMC via NCBI, confirmed CoQ10 as one of the most consistently beneficial supplements for sperm concentration and motility.

Typical research dose: 100 to 300 mg per day 

Food sources: Oily fish, meat, nuts, seeds (though food sources alone are unlikely to match therapeutic doses)

3. Vitamin C: Antioxidant Protection Against DNA Damage

Vitamin C is a water-soluble antioxidant that protects sperm DNA from oxidative damage. The seminal plasma contains high concentrations of vitamin C, and low levels are associated with increased sperm DNA fragmentation.

A review published in PMC via NCBI found that vitamin C supplementation improved semen parameters in studies of infertile men. The antioxidant mechanism is well understood: vitamin C neutralises reactive oxygen species (free radicals) that directly damage sperm cells and their genetic material.

Supplementation at 500 to 1,000 mg per day has been used in clinical trials. One study found that antioxidant supplements containing vitamin C alongside CoQ10, L-carnitine, zinc, and selenium produced marked improvements in sperm motility and vitality in men with asthenoteratozoospermia (poor sperm movement and abnormal shape).

Typical research dose: 500 to 1,000 mg per day 

Food sources: Citrus fruits, kiwi, bell peppers, broccoli, strawberries

4. Vitamin E: Protecting Sperm Cell Membranes

Vitamin E is a fat-soluble antioxidant that specifically protects the fatty membranes of sperm cells from oxidative damage. Because sperm cell membranes are rich in polyunsaturated fats, they are particularly vulnerable to free radical attack.

A systematic review in PMC via NCBI found vitamin E beneficial across several studies measuring sperm parameters and live birth rates. One randomised controlled trial found that 300 mg of vitamin E per day significantly improved sperm motility after six months, and a separate study showed improved pregnancy rates after three months of vitamin E supplementation.

The combination of vitamin E with selenium has also shown strong results. According to a review published via FACTS About Fertility, selenium and vitamin E together improved semen parameters and led to spontaneous pregnancies in a portion of participants.

Typical research dose: 300 to 400 mg per day 

Food sources: Sunflower seeds, almonds, hazelnuts, avocado, spinach

5. Vitamin D: The Sunshine Vitamin and Sperm Motility

Vitamin D deficiency is widespread in the UK, particularly during autumn and winter months. Beyond its role in bone health, vitamin D receptors are found in the testes, epididymis, and on sperm cells themselves, which gives it a direct influence on reproductive function.

A meta-analysis of five randomised controlled trials involving 648 infertile men, published in PMC via NCBI, found that vitamin D supplementation significantly improved total sperm motility, progressive sperm motility, and normal sperm morphology compared to placebo. Men with higher vitamin D levels tend to have better sperm quality and movement.

Research published in PMC via NCBI also found that higher levels of the active form of vitamin D (1,25-dihydroxyvitamin D3) were associated with better overall sperm quality in adult men seeking fertility care.

The NHS recommends 10 micrograms (400 IU) of vitamin D daily for all adults in the UK, particularly between October and March. Men with confirmed deficiency may benefit from higher therapeutic doses under medical supervision.

Typical research dose: 1,000 to 2,000 IU (25 to 50 micrograms) per day 

Food sources: Oily fish, egg yolks, fortified cereals (sunlight remains the primary source)

6. Folate (Vitamin B9): Supporting Sperm DNA Integrity

Folate is best known for its role in preventing neural tube defects during early pregnancy, but it also matters for male fertility. Folate supports DNA synthesis and repair, processes that are central to producing genetically healthy sperm.

A 2024 study found that men with adequate serum folate had higher sperm concentration, better vitality, greater motility, and lower risks of abnormal morphology and DNA damage compared to men with lower folate levels, as reported by CNY Fertility. The combination of folate and zinc together has been shown in meta-analysis to improve sperm parameters in infertile men.

It is worth noting that some large trials have not found a significant benefit from folic acid supplementation alone at high doses, suggesting that the benefit may be most pronounced when correcting an actual deficiency or combining with zinc.

Typical research dose: 400 to 800 micrograms per day (as folic acid or folate) 

Food sources: Dark leafy greens, lentils, beans, fortified cereals, asparagus

7. Vitamin B12: Sperm Count, Motility, and DNA Repair

Vitamin B12 (cobalamin) is one of the most directly linked B vitamins to sperm health. A review of multiple studies concluded that vitamin B12 is associated with improvements in sperm concentration and motility, as well as reductions in DNA fragmentation.

A 2024 study compared B12 levels in oligozoospermic (low sperm count) infertile men against fertile men. Infertile men had significantly lower B12 levels, according to CNY Fertility, suggesting a clear correlation between B12 deficiency and reduced sperm count.

A cross-sectional study of 156 men seeking fertility care, published in PMC via NCBI, found that higher serum levels of B12 were associated with changes in sperm DNA fragmentation index, placing it among the vitamins most closely connected to sperm genetic integrity.

Men who follow a vegan or strict vegetarian diet are most likely to be deficient in B12, as it is found almost exclusively in animal products.

Typical research dose: 1,000 micrograms per day (often as methylcobalamin) 

Food sources: Meat, fish, eggs, dairy, fortified plant milks

8. Selenium: Sperm Structure and Forward Movement

Selenium is a trace mineral that forms part of several antioxidant enzymes, including glutathione peroxidase, which protects sperm cells from oxidative damage. It also plays a structural role in the development of the sperm tail (flagellum), making it directly relevant to motility.

A systematic review published in the Reproductive BioMedicine Online journal found that selenium supplementation alone, or combined with N-acetylcysteine, improved the spermiogram (semen analysis results) of infertile men. One randomised trial found that 200 micrograms of selenium per day for six months improved semen volume, total sperm count, concentration, and morphology.

The combination of selenium and vitamin E has been tested in clinical trials and shown to improve multiple sperm parameters in men with idiopathic infertility.

Typical research dose: 100 to 200 micrograms per day 

Food sources: Brazil nuts (just 1 to 2 per day can meet daily requirements), tuna, sardines, eggs, sunflower seeds

9. L-Carnitine: Fuelling Sperm Energy and Motility

L-carnitine is an amino acid-derived compound found in high concentrations in the epididymis, where sperm mature and gain the ability to move. It plays a direct role in sperm energy metabolism by transporting fatty acids into mitochondria for energy production.

A systematic review and meta-analysis in Reproductive BioMedicine Online found that the combination of L-carnitine and acetyl-L-carnitine improved sperm parameters in infertile men across multiple randomised controlled trials. A separate systematic review in PMC via NCBI confirmed carnitines among the antioxidants with the strongest evidence for improving sperm motility and morphology.

Men with asthenozoospermia (poor sperm movement) appear to benefit most from L-carnitine supplementation, and several studies report improvements in both total and progressive motility after 3 months of use.

Typical research dose: 500 to 2,000 mg per day (often split between L-carnitine and acetyl-L-carnitine) Food sources: Red meat, poultry, fish, dairy (though dietary amounts are well below therapeutic doses)

10. Lycopene: The Carotenoid for Sperm Shape

Lycopene is a carotenoid antioxidant found predominantly in tomatoes and other red fruits. It accumulates in the testes and protects sperm from oxidative damage, with particular effects on sperm morphology and count.

Small studies suggest lycopene supplementation may improve sperm count, motility, and morphology, according to a review published by CNY Fertility. Lycopene was included in the multicentre Reproductive Medicine Network MOXI trial at 10 mg per day as part of a combined antioxidant formula, confirming its place in evidence-based male fertility supplementation protocols, as described in research published in PMC via NCBI.

Lycopene is best absorbed from cooked tomatoes, tomato paste, and tomato sauce, rather than raw tomatoes, as cooking breaks down the cell walls and releases the compound more readily.

Typical research dose: 6 to 14 mg per day Food sources: Tomato paste, tomatoes, watermelon, red peppers, pink grapefruit

A Quick Reference Summary

Nutrient	Primary Benefit	Key Research Dose
Zinc	Sperm count, testosterone	25–66 mg/day
CoQ10	Sperm concentration, motility	100–300 mg/day
Vitamin C	DNA protection, motility	500–1,000 mg/day
Vitamin E	Membrane protection, morphology	300–400 mg/day
Vitamin D	Motility, morphology	1,000–2,000 IU/day
Folate (B9)	DNA integrity, concentration	400–800 mcg/day
Vitamin B12	Count, DNA fragmentation	1,000 mcg/day
Selenium	Structure, motility, volume	100–200 mcg/day
L-Carnitine	Motility, energy metabolism	500–2,000 mg/day
Lycopene	Morphology, count	6–14 mg/day

What to Know Before Starting Supplements

A few practical points before adding anything to your routine:

• Allow three months minimum. Spermatogenesis takes around 74 days. Any supplement programme needs at least three months to show measurable results in a semen analysis.

• Get a semen analysis first. Knowing which specific parameters are low (count, motility, morphology, DNA fragmentation) helps you target supplementation more precisely. A blanket approach works but a targeted one works better.

• More is not always better. Some vitamins, including vitamin A, can negatively affect sperm quality at high doses. Research published in PMC via NCBI found that very high vitamin A levels were negatively associated with progressive sperm motility.

• Address lifestyle factors alongside supplementation. Smoking, heavy alcohol intake, obesity, heat exposure to the testes (tight underwear, hot baths, laptops on laps), and poor sleep all directly reduce sperm quality. Supplements work alongside lifestyle changes, not instead of them.

• Some supplements interact with medications. Always check with a GP or fertility specialist before starting high-dose supplementation, particularly if you take any prescription medicines.

Getting a Male Fertility Assessment

If you have been trying to conceive for 12 months without success (or 6 months if your partner is over 35), a semen analysis and fertility consultation is the right next step. At myGynaePlus, the specialist team in West London provides fertility assessments, consultations, and tailored guidance for couples navigating their conception journey.

Getting tested gives you a clear picture of where sperm quality stands. From there, supplementation, lifestyle changes, and medical treatment (where needed) can be approached with precision rather than guesswork.

Frequently Asked Questions

How long do vitamins take to improve sperm quality?

Sperm take approximately 74 days to develop from stem cells to mature sperm cells. This means any supplement programme needs at least three months before its effects show up in a semen analysis. Most clinical trials showing measurable improvements ran for three to six months. Starting a supplement routine at least three months before actively trying to conceive gives it the best chance to make a difference.

Can I get enough of these nutrients from food alone?

For some nutrients like lycopene, folate, zinc, and selenium, a varied, nutrient-dense diet can come close to beneficial levels. For others like CoQ10, L-carnitine, and vitamin D, achieving therapeutic doses through food alone is very difficult. The UK's low sunlight levels make vitamin D supplementation particularly relevant for most men between October and March. A combination of a healthy diet and targeted supplementation tends to give the best results.

Is it safe to take all these supplements together?

Many fertility supplements are sold as combined formulations that include several of these nutrients at appropriate doses. This makes them convenient and often safer than sourcing everything separately at high individual doses. Before taking multiple single-ingredient supplements simultaneously, speak to a GP or fertility specialist to avoid any risk of overdose, particularly with fat-soluble vitamins like E and D, which accumulate in the body.

Do these vitamins help with sperm DNA fragmentation specifically?

Yes. Several of these nutrients, particularly vitamin C, vitamin E, CoQ10, folate, and selenium, have shown direct benefits for reducing sperm DNA fragmentation in clinical studies. High DNA fragmentation is linked to failed IVF cycles and recurrent miscarriage even when sperm count and motility appear normal. If DNA fragmentation is a concern, antioxidant supplementation over three to six months is a commonly recommended approach before retesting.

When should a man see a fertility specialist rather than just taking supplements?

Supplements are most useful as a supportive measure for men with mildly suboptimal sperm parameters. If a semen analysis shows very low sperm count (below 5 million per millilitre), zero sperm, or if you have been trying to conceive for over 12 months without success, see a specialist promptly. A fertility consultation at a clinic like myGynaePlus can identify whether there is an underlying cause, such as a hormonal imbalance, varicocele, or genetic factor, that supplements alone will not address.