Does vaping affect sperm?

The honest state of the research

Vaping has only been widespread since around 2010, so the long-term picture on fertility is still being built. Most of what we know comes from a combination of animal studies on nicotine and human studies on cigarette smokers.

A 2025 review in the World Journal of Men's Health concluded that nicotine consumption in any form (smoking, hookah or vaping) has a detrimental impact on sperm motility, count and production. A 2025 study comparing vapers to cigarette smokers undergoing IVF found vapers had better sperm motility than smokers, but the study did not include a non-smoking control group.

The honest summary: nicotine is the main known problem, and vape aerosol carries other potential concerns like heavy metals. Vaping appears better than smoking for fertility but worse than nothing.

How nicotine affects sperm

The vape-specific concerns beyond nicotine

Vape aerosol contains more than just nicotine. Some of those other compounds may affect sperm too.

• Heavy metals. Vape coils can release trace amounts of nickel, lead, cadmium and chromium into the aerosol. Johns Hopkins research in 2024 detected unsafe levels in some devices.
• Hormone disruption. Nicotine can disrupt the hypothalamic-pituitary-gonadal axis, the hormone system that controls testosterone and sperm production. Lower testosterone means less sperm.
• Oxidative stress. Vaping increases oxidative stress markers in the body. Sperm are particularly vulnerable to oxidative damage because of their fatty membrane.
• Reduced libido. Animal studies have shown reduced sexual interest with chronic nicotine exposure. Not the same as fertility but obviously related to conception.

Vaping vs smoking for fertility

For male fertility specifically, vaping does appear to be the lesser evil. A 2025 IVF study from China found:

The picture is genuinely mixed. Vapers fared better than smokers on some measures and worse on others, but on the bigger outcome of successful IVF, vaping appeared to be the better of the two.

If you and your partner are trying to conceive

Quitting nicotine entirely is the safest move while you are trying. But the timeline matters.

1. Aim to be nicotine-free for at least 3 months before trying

   Sperm take about 70 to 90 days to develop from start to finish. Three months without nicotine gives a fresh batch of sperm a clean start.

2. Get a semen analysis if you can

   NHS fertility services can test sperm count, motility and morphology if your GP refers you. Useful baseline to see if vaping has been affecting you.

3. Use nicotine patches or pouches if quitting cold turkey is hard

   Patches keep nicotine in your system but at lower, more steady levels than vaping. Pouches similarly. Not nicotine-free, but a step in the right direction.

4. Improve other lifestyle factors

   Better diet, less alcohol, regular exercise, weight management and stress reduction all improve sperm quality. Stacking improvements helps more than any single change.

5. See your GP if you have been trying for 12 months without success

   NHS guidance is to seek fertility advice after a year of trying (or 6 months if your partner is over 35). Vaping is one of many things they will explore.

The bottom line