Infertility researchers at the University of Wisconsin at Madison suggest that consuming 1,000 mg of calcium and 10 micrograms of vitamin D each day may improve men's fertility. Cut out or cut back on alcohol. While an occasional drink is generally considered safe, studies show that daily consumption of wine, beer, or hard liquor can decrease testosterone levels and sperm counts, and increase the number of abnormal sperm in your ejaculate. Go cold turkey on recreational drugs, such as marijuana and cocaine. Marijuana can decrease your sperm's motility and, like cocaine, it can affect the brain chemistry responsible for releasing reproductive hormones.
Drug use can also cause birth defects.
A host of lifestyle factors can be perilous to your potency. The good news is, once you become aware of these often hidden fertility drainers, they are fairly easy to avoid. Hot tubs, saunas, and tight-fitting clothes. Testicles function best when they keep their cool. Steamy spa equipment, snug jeans, synthetic shorts, and bikini underwear can all overheat your testicles and inhibit sperm production.