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How can you increase sperm quality and quantity after the age of 40?

Moderate evidence

Improving sperm quality after forty is possible through lifestyle adjustments and, if you have a varicocele, surgical correction. Do not expect miraculous results, but targeted steps do make a difference.

What does workCan exercise really improve your hormone levels as you get older?

From the age of forty, sperm quality declines on multiple fronts: volume drops, total sperm count and motility decrease, and morphology (shape) worsens. At the same time, the proportion of sperm cells with damaged DNA rises. This makes conception harder and takes longer on average. The cells in the testes that support sperm production and produce testosterone function less effectively as you age, and oxidative stress plays a role in this.

The most concrete medical approach is correcting a varicocele, a varicose vein in the scrotum that raises the temperature of the testes. In men over forty, sperm quality improved in well over half of cases following such a procedure, though this was somewhat less than in younger men. Younger men benefited more from the intervention, but even in men older than forty there was a clear advantage. If you know you have a varicocele, a conversation with a urologist about this option is worthwhile.

Lifestyle also has a measurable effect. Quitting smoking, reaching a healthy weight, eating a varied diet, exercising, and avoiding unnecessary heat exposure to the testes (such as hot baths or laptops on the lap) are changes that can positively influence sperm quality. The quality of drinking water also plays a role: exposure to pesticides and industrial chemicals lowers testosterone and impairs sperm production. Whether this personally affects you depends on where you live and work.

A hypothetical idea in the literature is the administration of blood from young donors to improve sperm quality. This is purely a theoretical proposal with no clinical evidence in humans. It must be regarded as experimental and unsafe, and is not a realistic option.

The evidence
8 studies

Based on multiple observational and clinical studies (including studies in men over 40 with varicocele). No large RCTs are available for most interventions. The lifestyle recommendations are associational in nature.

Last checked: September 2026 · how this was judged
Related answers

Does my libido decline after 40, and is there anything I can do about it?

A decline in libido after 40 is normal but not inevitable. For men with a confirmed low testosterone level and associated symptoms a well-supported treatment exists, and for women around the menopause hormone therapy offers concrete help, particularly for vaginal complaints.

Yes · Moderate evidence

What can help women increase their libido?

There are several well-supported options depending on your life stage: for women after menopause, transdermal testosterone has the strongest evidence base, and mindfulness therapy works for a broader group. Always discuss medication options with your doctor, as availability and long-term safety require a personal assessment.

Yes · Moderate evidence

Can exercise really improve your hormone levels as you get older?

Yes, exercise demonstrably raises several hormone levels in people over 40. The strongest practical benefit lies in muscle preservation: strength training is the most effective approach for that, regardless of which type of training you choose.

Yes · Moderate evidence

Can women preserve their fertility longer through lifestyle choices?

Lifestyle can influence your fertility, but genetics largely determines when you go through menopause. Avoid frequent heavy drinking, limit exposure to air pollution and hormone-disrupting substances, and consider folic acid supplements up to 800 mcg per day if you want to protect your fertility.

Moderate evidence

Does testosterone decline in men with age, and should you do something about it?

Testosterone really does decline in men with age. TRT is well supported only in men with established hypogonadism and symptoms, primarily for sexual function. If you have symptoms, always have the underlying cause investigated first.

Yes · Strong evidence

How does your body fat affect hormone production as you get older?

Body fat has a considerable influence on your hormonal balance as you age: more abdominal fat disrupts insulin sensitivity, and conversely, lower oestrogen or testosterone levels worsen fat accumulation around the abdomen. Exercise and maintaining a healthy weight are the most concrete levers you have within your own control.

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