Most men can meaningfully increase their sperm count through a combination of diet, exercise, temperature management, and lifestyle changes. The key thing to understand upfront: sperm take about 64 days to fully develop and mature. That means any change you make today won’t show up in a semen analysis for roughly two to three months. This isn’t a quick fix, but the evidence behind these strategies is solid.
What Counts as a Low Sperm Count
A sperm concentration below 15 million per milliliter, or a total count below 39 million per ejaculation, has traditionally been considered low. These numbers come from the World Health Organization, though the most recent edition of their guidelines has moved away from strict cutoffs, recognizing that fertility depends on many factors beyond a single number. A semen analysis from your doctor gives you a baseline to measure progress against.
About 15% of couples experience infertility, defined as not conceiving within 12 months of trying (or 6 months if the female partner is over 35). If you have a history of undescended testicles, chemotherapy, or pelvic surgery, it’s worth getting evaluated regardless of how long you’ve been trying.
Shift Your Diet Toward Whole Foods
The single best-studied dietary pattern for sperm health is the Mediterranean diet: heavy on fruits, vegetables, nuts, legumes, and whole grains, and low on sugar, sweetened drinks, and processed or red meat. A meta-analysis of eight studies covering over 1,800 men found that higher adherence to this pattern was associated with roughly 24 million more sperm per ejaculation. In one randomized clinical trial, men who followed a Mediterranean diet for six months saw significant increases in both sperm concentration and total count compared to their starting values.
You don’t need to overhaul your kitchen overnight. The consistent signal across studies is that replacing processed food with whole food matters more than any single “superfood.” Think walnuts over chips, lentils over hot dogs, water over soda.
Exercise at a Moderate Intensity
Physical activity and sperm quality follow an inverted U-shaped curve. Too little does nothing, too much actually harms sperm, and the sweet spot is in the middle. Moderate to vigorous activity has been linked to better sperm concentration and total count in healthy young men. The mechanism likely involves improved blood flow, lower oxidative stress, and better hormone regulation.
Research looking at varying exercise intensities over eight months found that moderate activity (roughly 150 to 300 minutes of brisk walking, jogging, or swimming per week) was associated with significant improvements in sperm motility. Low-intensity exercise and elite-level training both correlated with worse outcomes. If you’re sedentary, building up to regular moderate exercise is one of the most effective changes you can make. If you’re already training intensely, scaling back may actually help.
Keep Your Testicles Cool
The testicles hang outside the body because sperm production requires temperatures about 2 to 3°C below core body temperature. Sustained heat exposure disrupts this process. A longitudinal study of men who used a sauna twice weekly for three months found significantly impaired sperm count and motility by the end of the exposure period, along with damage to sperm DNA structure.
Practical sources of excess scrotal heat include:
- Laptops on your lap. The heat from the device plus the closed-leg position raises scrotal temperature.
- Frequent saunas or hot tubs. Occasional use is likely fine, but regular sessions (multiple times per week for months) can cause measurable declines.
- Tight underwear and prolonged sitting. Boxers allow more airflow than briefs, and taking breaks from sitting helps.
The good news is that heat-related damage is typically reversible. Once you remove the heat source, new sperm produced over the next two to three months develop under normal conditions.
Cut Back on Alcohol and Quit Smoking
Both alcohol and tobacco directly impair sperm production. Because new sperm are constantly being made but take two to three months to mature, changes to your drinking and smoking habits take several weeks to show results in a semen analysis. Cutting back on alcohol improves both sperm health and your overall fertility odds. You don’t necessarily need to go completely dry, but heavy or regular drinking is clearly harmful.
Smoking damages sperm DNA, reduces concentration, and impairs motility. The effects are dose-dependent, meaning the more you smoke, the worse the impact. Quitting gives your body a full cycle of spermatogenesis (roughly 64 days) to start producing healthier sperm.
Supplements That Have Evidence Behind Them
A few supplements have shown real effects in clinical trials, though they work best alongside the lifestyle changes above, not as replacements for them.
Ashwagandha is the most impressive performer in recent research. In a randomized, double-blind, placebo-controlled trial, men taking 300 mg twice daily for eight weeks saw a 38% increase in total sperm count, a 33% increase in sperm concentration, and an 87% increase in sperm motility. Those are substantial numbers, and the study design (placebo-controlled, double-blind) makes the findings more reliable than observational data.
Coenzyme Q10 has more mixed results. A systematic review of randomized controlled trials found that CoQ10 supplementation (typically 200 mg daily for three months) consistently improved sperm motility but did not reliably increase sperm concentration or ejaculate volume. If motility is your main concern, CoQ10 may help. If your primary goal is raising count, it’s less likely to move the needle on its own.
Sleep and Stress Play a Supporting Role
Short sleep duration and trouble sleeping are generally associated with poorer semen quality, though the effect sizes are modest. A prospective study found small positive associations between sleep duration and sperm concentration, motility, and total count. The relationship isn’t as dramatic as diet or exercise, but consistently sleeping fewer than six hours is working against you.
Chronic stress raises cortisol, which can suppress testosterone and interfere with sperm production. Stress management (whether through exercise, better sleep, or whatever works for you) supports the hormonal environment that sperm development depends on. Think of sleep and stress as the foundation that makes everything else work better.
A Realistic Timeline for Results
Given the 64-day spermatogenesis cycle, plan on at least three months before expecting meaningful changes on a semen analysis. Most clinical trials showing improvements ran for 8 to 24 weeks. If you make several changes at once (cleaning up your diet, starting moderate exercise, reducing alcohol, and adding a supplement), you’re giving yourself the best chance of seeing a noticeable difference at that three-month mark.
If your count remains low after three to six months of consistent effort, a reproductive urologist can investigate whether there’s an underlying cause like a varicocele (enlarged veins in the scrotum), a hormonal imbalance, or a genetic factor that lifestyle changes alone won’t address.