What body fluids glow under black light?

Black lights make fluorescers glow, like the posters of the 1960s. Fluorescers naturally occur in some biological fluids, but they also occur in vitamins, laundry detergents and soda water containing quinine. read more

Many body fluids contain fluorescent molecules. Forensic scientists use ultraviolet lights at crime scenes to find blood, urine, or semen. Blood does not glow under a black light, but it reacts with a chemical that does fluoresce, so it can be detected after this reaction using ultraviolet light at a crime scene. read more