That situation is a tricky situation...i wish i knew myself.
Substance abuse, also known as drug abuse, is a patterned use of a drug in which the user consumes the substance in amounts or with methods which are harmful to themselves or others, and is a form of substance-related disorder.
Essential Amino Acids. The "essential" refers to it being necessary to derive them from the foods we eat, but in fact the amino acids that the body produces are just essential to the proper functioning and health of our bodies. Hope this helps and good luck! :)
Something that a human or a living thing can get affecting it to be not the same