â (statistics) a variable in a logical or mathematical expression whose value depends on the independent variable 1. the dependent variable. â (statistics) a variable in a logical or mathematical expression whose value depends on the independent variable 1. dependent variable [ the ~ ] noun.
The building blocks that make up all proteins, including collagen, are called amino acids. An essential amino acid is one your body cannot make, so you have to get it from food or dietary supplements. Collagen is the most abundant protein in the body and is a key constituent of all connective tissues. Collagen provides the infrastructure of the musculoskeletal system, essential for mobility.
There are at least 16 types of collagen, but 80-90% of the collagen in the body consists of types I, II, and III. Type I collagen fibrils are stronger than steel (gram for gram). Collagen is most commonly found within the body in the skin, bones and connective tissues. The word collagen is derived from the Greek kolla, meaning glue. Collagen gives the skin its strength and structure, and also plays a role in the replacement of dead skin cells.