Sexually Transmitted Infections (STIs)

Sexually transmitted infections are infections passed on through sexual contact, caused by bacteria, viruses or parasites that take hold in the genital tract, mouth or bloodstream and need a medical diagnosis. Zinc and vitamin D are the supplements most often discussed alongside them, largely for their part in immune function, but little research on them has been reviewed here so far. Any evidence that exists is limited, so these are not substitutes for proper testing and care.