Zinc not only supports healthy immunity and cell growth,the essential mineral also helps produce testosterone as well as boost your libido and energy. Research has found a Source between zinc deficiency and sexual dysfunction in men, so taking 11 milligrams of zinc per day — the recommended amount — may improve ejaculation time.

A 2009 study conducted on rats showed that zinc supplements can increase testosterone, which may improve sexual problems, such as premature ejaculation. Taking too much zinc, though, may cause:

nausea
vomiting
diarrhea
kidney and stomach damage
a metallic taste in your mouth