Proetins are large moleclues built from small units known as amino acids, they are used for grwoth and reapir, also for strnegthening the bones.They help to make tissue and cells. They can be found in ainmals, plnats, fungi, bacetria, and also in the human body. For eaxmple, muscels cotnain a lot of proteins. Body builedrs will eat foods with a lot of protein as an easy way to keep or gain high leevls of msucles that is safer than tkaing steorids. Protenis form an impotrant part in foods like milk, eggs, meat, fish, beans, and nuts. Aniamls eat proteins to get enegry and amino acids. These amino acids are used to built new prtoeins that are used as enyzmes, hormnoes, or antiobdies. Protein is also very heatlhy and keeps you srtong and makes your bones last.
Porteins were discovreed by Bezrelius, in 1838.
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