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.
Essential meaning that if a nutrient is not present, aspects of function and therefore human health decline.When nutrient intake does not regularly meet the nutrient needs dictated by the cell activity, the metabolic processes slow down or even stop..onsider that in light of Webster's definition of medicine: . The science and art dealing with the maintenance of health and the prevention, alleviation, or cure of disease.  Food acts as medicine, to maintain, prevent, and treat disease.