Low sperm count can often be improved through a combination of lifestyle changes, dietary adjustments, and in some cases, medication. The key thing to understand upfront: sperm take roughly 42 to 76 days to fully develop, so any change you make today won’t show up on a semen analysis for at least two to three months. That timeline applies to everything below, from diet to supplements to quitting smoking.
Keep Your Body at a Healthy Weight
Excess body fat raises estrogen levels and lowers testosterone, both of which directly interfere with sperm production. Losing even a moderate amount of weight can shift this hormonal balance back in your favor. The relationship between exercise and sperm count is more nuanced than you might expect. One study comparing physically active men to sedentary men found no significant difference in sperm concentration between the two groups. What exercise does reliably accomplish is help you maintain a healthy weight and improve hormonal health, which supports sperm production indirectly.
That said, intense endurance training (marathon running, long-distance cycling) can temporarily suppress testosterone and raise scrotal temperature, so moderate activity is the sweet spot. Aim for regular movement without overdoing it.
Reduce Heat Exposure to the Testicles
Sperm production requires temperatures slightly below core body heat, which is why the testicles sit outside the body. Anything that raises scrotal temperature for prolonged periods can suppress production. Common culprits include laptops on your lap, hot tubs, saunas, tight underwear, and prolonged sitting.
Scrotal cooling devices have been tested in clinical settings and showed meaningful improvements: motility increased from 25.4% to 29.0%, and sperm vitality jumped from 64.8% to 71.7% after cooling. You don’t necessarily need a device, though. Switching to loose-fitting boxers, taking breaks from sitting, and avoiding hot baths can all help lower scrotal temperature over time.
Cut Back on Alcohol
A large study of over 1,200 young men found a clear, dose-dependent relationship between alcohol intake and declining sperm quality. The effect became statistically noticeable at just 5 drinks per week, with sperm concentration, total count, and the percentage of normally shaped sperm all dropping as consumption increased. Men drinking more than 25 units per week saw the most pronounced decline, and those consuming over 40 units weekly had significantly lower sperm concentration and morphology compared to men who had only 1 to 5 drinks per week.
You don’t have to quit entirely, but keeping intake under 5 drinks per week is where the data suggests you’re minimizing harm to sperm production.
Stop Smoking
Cigarette smoke introduces hundreds of toxic compounds into the bloodstream, many of which accumulate in seminal fluid. Smoking is consistently associated with lower sperm counts, reduced motility, and higher rates of DNA damage in sperm. The damage is dose-dependent, meaning the more you smoke, the worse the effect, but even light smoking has measurable consequences. Quitting gives your body a chance to recover over the next sperm production cycle.
Limit Exposure to Endocrine Disruptors
Chemicals that mimic or block hormones are surprisingly common in everyday products. Phthalates (found in plastics, shampoos, soaps, and cosmetics) decrease sperm concentration, normal morphology, and motility. Bisphenol A, or BPA (found in plastic containers, can linings, and receipt paper), competes with natural hormones in the testes and inhibits testosterone production. Polychlorinated biphenyls, or PCBs, suppress the cells responsible for sperm production and have been linked to decreased count and motility. Research suggests that combined exposure to multiple endocrine disruptors can have additive effects, potentially causing up to a 50% increase in reproductive abnormalities.
Practical steps to reduce your exposure:
- Food storage: Use glass or stainless steel instead of plastic containers, especially for hot food
- Water bottles: Choose BPA-free or non-plastic options
- Personal care products: Look for phthalate-free shampoos, soaps, and deodorants
- Canned food: Reduce consumption, since many cans are lined with BPA-containing resins
- Receipts: Thermal paper receipts contain BPA that absorbs through skin, so decline them when possible
Get the Right Amount of Sleep
Sleep duration has a U-shaped relationship with sperm quality, meaning both too little and too much sleep are associated with worse outcomes. Men sleeping less than 6 hours per night had 12% lower semen volume compared to men sleeping 8 to 8.5 hours. They also had lower total and progressive sperm motility by about 4 to 5 percentage points. Interestingly, men sleeping more than 9 hours also showed reduced semen volume.
The optimal range appears to be 7.5 to 8.5 hours per night. Consistency matters too. Irregular sleep patterns disrupt the hormonal cycles that regulate testosterone production, which peaks during sleep.
Eat for Sperm Health
No single food will dramatically boost your count, but certain dietary patterns support the process. Diets rich in antioxidants help protect developing sperm from oxidative damage, which is one of the most common causes of poor sperm quality.
Walnuts are one of the better-studied foods in this area. Adding walnuts to a typical Western diet improved sperm motility, vitality, and morphology in men, likely by reducing oxidative damage to sperm cell membranes. Lycopene-rich foods like tomatoes, watermelon, and red peppers also provide antioxidant protection. A diet built around fruits, vegetables, whole grains, fish, and nuts consistently outperforms processed-food-heavy diets in fertility research.
Supplements: What Actually Works
Supplements are widely marketed for male fertility, but the evidence is more modest than the advertising suggests. A randomized, double-blind trial tested a combination of zinc (80 mg/day), folic acid (1.6 mg/day), and L-carnitine (880 mg/day) for three months. The result: no significant differences in sperm count, motility, or vitality compared to placebo. Sperm concentration barely moved, going from 44.6 to 45.9 million per milliliter.
That doesn’t mean supplements are useless across the board. Antioxidant supplements did reduce DNA damage in sperm, which matters for fertilization success even when count doesn’t change. If you have a specific nutritional deficiency (zinc deficiency is common and directly impairs sperm production), correcting it with supplementation can help. But for men with adequate nutrition, adding more supplements on top rarely moves the needle on count alone.
When Lifestyle Changes Aren’t Enough
If your count remains low after three to six months of lifestyle optimization, medication may be an option. One commonly prescribed approach works by stimulating your body to produce more of the hormones that drive sperm production. In one review, men using this treatment saw average sperm concentration rise from 15.2 million per milliliter to 62.8 million per milliliter, a roughly fourfold increase. It’s taken as a small tablet every day or every other day, typically for three to six months before results are evaluated.
Hormonal causes of low sperm count, like low testosterone signaling from the brain to the testes, respond particularly well to this type of treatment. Structural issues like varicocele (enlarged veins in the scrotum) may require a minor surgical procedure that improves sperm production in roughly 60 to 70% of cases. A fertility specialist can determine whether your low count has a correctable cause through blood work and a physical exam.
How Long Before You See Results
The full sperm production cycle takes approximately 42 to 76 days, with 74 days being the most commonly cited estimate. This means any intervention needs at least two to three months before it shows up in a semen analysis. Most fertility specialists recommend waiting a full three months before retesting.
Stacking multiple changes at once (improving diet, reducing alcohol, managing weight, sleeping better, reducing heat exposure) gives you the best chance of a meaningful improvement, since these factors compound. A single change in isolation may produce only a small shift, but several together can add up to a clinically significant difference.