Clubs and amusement parks use special black light paint that glows different colors. You can also buy fluorescent black light bubbles, invisible black light ink, fluorescent black light carpet and even fluorescent black light hair gel. Ordinary highlighters work well as black light pens..
The definition of a nutrient is something that provides nourishment, food or substances necessary for growth. Protein is an example of a nutrient.
A chemical substance that an organism must obtain in relatively large amounts. A nutrient that an organism needs in small quantity, typically a vitamin or a mineral. capable of invading and living on the human body derive all essential nutrients from host tissues, tissue fluids, secretions, and wastes.