You can increase your sperm count through a combination of dietary changes, temperature management, weight loss, and avoiding specific substances that suppress sperm production. Because sperm take roughly 42 to 76 days to fully mature, most lifestyle changes need two to three months before they show up in a semen analysis. That timeline matters: quick fixes don’t exist here, but consistent changes produce measurable results.
Why Results Take Two to Three Months
Sperm cells aren’t produced overnight. The full cycle of spermatogenesis, from the earliest precursor cell to a mature sperm ready for ejaculation, takes approximately 74 days on average. Some men complete the process in as few as 42 days, others closer to 76. This means that any change you make today is really an investment in the sperm your body will produce over the next two to three months. A semen analysis done one week after changing your habits won’t reflect those changes at all.
Keep Your Testicles Cool
Sperm production requires a temperature about 3°C (roughly 5°F) below core body temperature. That’s why the testicles sit outside the body. Even a modest increase of 1.5 to 2°C in scrotal temperature is enough to inhibit spermatogenesis.
Practical sources of excess heat include tight underwear, hot baths and saunas, laptops placed directly on your lap, and prolonged sitting (especially relevant for desk workers and long-haul drivers). Switching to loose-fitting boxers, taking cooler showers, and standing or walking periodically throughout the day are simple changes that help maintain the temperature your body needs for healthy sperm production. The effect of heat exposure is typically temporary, so removing the source allows production to recover within one to two spermatogenesis cycles.
Improve Your Diet
What you eat has a direct impact on sperm quality. A Mediterranean-style diet, built around vegetables, fruits, whole grains, fish, olive oil, and nuts, is one of the best-studied dietary patterns for male fertility. Men with medium to high adherence to this eating pattern reduced their risk of low total sperm count by 69% to 75% compared to men who didn’t follow it, according to a cross-sectional study published in Nutrients.
The mechanism is straightforward. This type of diet provides omega-3 and omega-6 fatty acids, antioxidants, and key minerals that protect sperm cell membranes, reduce oxidative stress, lower inflammation, and improve the energy output of sperm cells. You don’t need to follow a rigid plan. The core principle is eating more whole foods, healthy fats (especially from fish and olive oil), and produce while cutting back on processed food, saturated fat, and excess sugar.
Reach a Healthy Weight
Carrying extra weight significantly raises your odds of a low sperm count. A large meta-analysis combining 14 studies found that overweight men were 11% more likely to have a low sperm count than normal-weight men. For obese men, the risk jumped to 42%. Even more striking, obese men were 81% more likely to produce no sperm at all in their ejaculate.
Excess body fat disrupts hormone signaling. Fat tissue converts testosterone into estrogen, shifting the hormonal balance your body needs for sperm production. Losing weight through a combination of diet and exercise can help restore that balance. You don’t need to reach a bodybuilder physique. Even moderate weight loss moves the needle.
Supplements That May Help
Coenzyme Q10 (CoQ10) is one of the more thoroughly studied supplements for male fertility. A systematic review and meta-analysis of randomized controlled trials found that men taking CoQ10 had significantly higher total sperm counts compared to men taking a placebo. Most studies used doses between 100 and 400 mg per day for 12 weeks to six months.
One important nuance: CoQ10 improved total sperm count but did not significantly increase sperm concentration (the number of sperm per milliliter) or semen volume. This suggests it helps the body produce more sperm overall without necessarily changing the density of each sample. CoQ10 acts as an antioxidant inside cells, protecting sperm from oxidative damage during development. Other commonly recommended supplements include zinc, selenium, and folate, though the evidence for CoQ10 is among the strongest.
Substances That Lower Sperm Count
Alcohol and Tobacco
Heavy alcohol use suppresses testosterone production and impairs sperm development. Smoking damages sperm DNA and reduces count and motility. Both are dose-dependent: the more you use, the greater the effect. Cutting back or quitting gives your body the best chance of recovery.
Medications to Watch For
Several common prescriptions can reduce sperm production, sometimes dramatically. Testosterone replacement therapy is the biggest offender. When you take external testosterone, your body stops making its own, and testosterone levels inside the testicles drop too low to support sperm production. The result is often a very low count or a complete absence of sperm. This is reversible after stopping, but recovery takes six to twelve months or more.
Other medications that can interfere include opioid painkillers (which disrupt testosterone signaling with long-term use), hair loss and prostate medications like finasteride and dutasteride, and the oral antifungal ketoconazole. SSRIs prescribed for depression and anxiety can cause sexual dysfunction, particularly delayed ejaculation, though their direct impact on sperm count is less clear. If you’re taking any of these and trying to conceive, talk to your prescriber about alternatives.
Reduce Exposure to Environmental Chemicals
Endocrine-disrupting chemicals interfere with the hormones that drive sperm production. Two of the most common are phthalates and bisphenol A (BPA). Phthalates are found in soft plastics, vinyl flooring, personal care products, and food packaging. BPA lines many canned foods and is present in certain hard plastics and thermal receipt paper. Both chemicals have been linked to reduced semen quality, lower testosterone production, and impaired sperm development.
BPA triggers the buildup of damaging molecules called reactive oxygen species inside cells, creating oxidative stress that harms developing sperm. Phthalates disrupt testosterone synthesis and, in animal studies, damage the support cells that sperm rely on during maturation. Pesticide exposure has also been statistically correlated with lower sperm count, volume, and motility, particularly in rural agricultural areas.
You can reduce your exposure by choosing glass or stainless steel containers over plastic for food storage, avoiding microwaving food in plastic, choosing fragrance-free personal care products, washing fruits and vegetables thoroughly, and opting for BPA-free canned goods when possible.
Rule Out a Varicocele
A varicocele is an enlargement of veins within the scrotum, similar to a varicose vein in the leg. It raises scrotal temperature and is one of the most common treatable causes of low sperm count. Varicoceles are found in 35% to 44% of men with primary infertility and in up to 81% of men with secondary infertility (men who have fathered a child before but are now having difficulty). Many men don’t know they have one because varicoceles are often painless. A urologist can diagnose one with a physical exam or ultrasound, and repair is a relatively straightforward outpatient procedure.
Putting It All Together
The most effective approach combines several of these strategies at once. Keep your testicles cool, clean up your diet, get to a healthier weight if needed, stop smoking, moderate alcohol, and reduce chemical exposures. Add CoQ10 if you want supplement support. Review your medications with a doctor. Then give it a full two to three months before retesting, because that’s how long your body needs to produce an entirely new batch of sperm reflecting your new habits.