The Importance of Vitamin C for Testosterone and Sperm Health

• September 30, 2025
• Dr Luke Wee

Last updated on October 7, 2025

Vitamin C is one of the most essential nutrients in the human diet, best known for supporting immunity and acting as a powerful antioxidant. But beyond these well-known roles, interest has grown in how it relates to male reproductive health. This raises a key question: Does vitamin C increase testosterone, and what impact does it have on sperm health?

In this blog post, we explore the role of vitamin C in testosterone regulation, its impact on sperm health, the best dietary sources and clear up common concerns such as whether a vasectomy affects hormone levels. By the end, you’ll have a clear understanding of how this vital nutrient fits into the bigger picture of male reproductive wellbeing.

Understanding Testosterone and Male Reproductive Health

Testosterone is the primary male sex hormone, with roles in muscle mass, bone density, libido, mood and sperm production. Levels naturally peak in early adulthood and gradually decline with age, although factors such as stress, poor diet and lack of sleep can accelerate this decline. Maintaining healthy testosterone is important for reproductive function and wider wellbeing.

The Role of Vitamin C in the Body

Vitamin C, or ascorbic acid, is a water-soluble vitamin that plays several important roles in keeping the body healthy. One of its key benefits is acting as an antioxidant, helping to protect cells from damage caused by unstable molecules known as free radicals.

• Supports immune defence and collagen formation
• Helps the body absorb iron
• Reduces oxidative stress by neutralising free radicals
• Protects tissues and hormones involved in reproductive function

Does Vitamin C Increase Testosterone?

Vitamin C may support healthy testosterone levels, especially in older men or those under stress. A 2023 study showed that higher blood levels of vitamin C were linked to increased testosterone and a better hormonal profile in infertile men.

It’s not a direct testosterone booster, but by helping reduce oxidative stress and supporting hormone-producing cells, vitamin C may contribute to a more balanced hormonal environment when combined with a healthy lifestyle.

Vitamin C and Sperm Health

Vitamin C is closely linked to sperm health because of its strong antioxidant properties. Oxidative stress can damage sperm DNA and reduce motility, but vitamin C helps shield sperm cells from this harm. Clinical research has shown that men who take vitamin C supplements may see improvements in sperm count, motility and morphology, making it an important nutrient for reproductive health.

Dietary Sources of Vitamin C

Since the body cannot produce vitamin C on its own, it must be obtained through diet. A variety of everyday foods provide rich sources of this nutrient:

• Citrus fruits such as oranges, lemons and grapefruits
• Kiwifruit, strawberries and papaya
• Red and green capsicum
• Leafy greens like kale and spinach
• Broccoli and Brussels sprouts

Vasectomy and Testosterone Levels

While nutrition and antioxidants like vitamin C can support reproductive health, it’s also important to address a common concern around vasectomy. Many men worry that undergoing the procedure might affect their hormones.

In reality, vasectomy does not influence testosterone production. The hormone is produced in the testes and released into the bloodstream independently of the vas deferens, the tubes that are divided during the procedure.

This means that men who choose vasectomy as a permanent contraceptive option can be reassured that their testosterone levels, libido and other hormonal functions remain unchanged.

Final Thoughts

Vitamin C plays a valuable role in men’s health by protecting cells from oxidative stress, supporting hormone-producing tissues and improving sperm quality. While it is not a direct testosterone booster, it helps create the right conditions for healthy hormone balance and reproductive function.

Including vitamin C-rich foods in your diet, or considering supplementation if needed, is a simple step that can make a meaningful difference. Combined with other healthy lifestyle choices, vitamin C contributes to long-term reproductive health and overall wellbeing.

How to book a vasectomy appointment

• Fill out our online booking form
• Call us: 0800 884 408
• Email us: info@thecooperclinic.co.nz

Frequently Asked Questions

Does vitamin C help increase testosterone naturally?

Vitamin C may support testosterone levels by reducing oxidative stress and helping hormone-producing cells function effectively. It is not a direct booster but contributes to a healthier hormonal balance.

How does vitamin C support sperm health and fertility?

Vitamin C protects sperm cells from oxidative damage, which can improve motility and DNA integrity. Studies suggest supplementation may enhance sperm count and overall semen quality.

What are the benefits of vitamin C for testosterone and sperm production?

Vitamin C helps lower oxidative stress, which benefits both hormone balance and sperm development. This dual role makes it an important nutrient for male reproductive health.

What is the connection between vitamin C, testosterone and male reproductive health?

Vitamin C contributes to a balanced hormonal environment while also protecting sperm from oxidative stress. Together, these effects support fertility and overall reproductive wellbeing.

Does vitamin C boost sperm count and motility?

Research has shown that vitamin C supplementation can increase sperm count, motility and normal morphology. These improvements are linked to its antioxidant action.

Can vitamin C supplementation improve hormone balance and fertility?

Vitamin C helps regulate stress-related hormones like cortisol, indirectly supporting testosterone balance. It also enhances sperm quality, making it beneficial for male fertility.

How much vitamin C is needed for reproductive health?

Most men can achieve adequate intake through a balanced diet rich in fruits and vegetables. In some cases, supplementation may be considered under medical guidance.

Which foods are highest in vitamin C for fertility support?

Citrus fruits, kiwifruit, berries and capsicum are excellent natural sources of vitamin C. Including a variety of these foods daily helps maintain healthy levels.

Can vitamin C reduce sperm DNA fragmentation?

Yes, vitamin C helps protect sperm DNA from oxidative damage, which can lower the risk of fragmentation. This may improve the chances of healthy fertilisation.

Is vitamin C alone enough to improve male reproductive health?

Vitamin C is an important nutrient, but it works best as part of a wider lifestyle that includes balanced nutrition, exercise and good sleep. Together, these factors have the greatest impact on fertility and hormone health.