Amino Acids - Why We Need Them

Amino acid(s)
Compounds that link together to make proteins. Essential amino acids are released in the intestines when food containing protein is digested -- the body cannot make them. Non-essential amino acids can be made by the body. Amino acids contain carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.

Protein(s)
A complex substance made of amino acids and which include many compounds necessary for life like hormones, enzymes, and immunoglobins. Proteins are found in cells and tissue. The type of protein depends on the kinds and number of amino acids that make it. Proteins are used in building cells, cell functions, muscle contraction, digestion, growth, etc.

Enzyme(s)
A complex protein made by a cell which is a catalyst (something that starts a reaction or chain of events) for a specific biochemical reaction which does not change the enzyme. Enzymes control digestion, muscle contraction, and many other functions of metabolism.

Cell(s)
The smallest structural unit of life capable of functioning by itself, a cell has a membrane which allows some things to pass through. Inside the cell are one or more nuclei and other cellular parts. Cells contain DNA and make up our bodies.

List of Amino Acids