There are slight differences in the meanings of these terms, but they are often used interchangeably. 1  Independent Variable: It implies causality: the independent variable affects the dependent variable. 2  Used predominantly in ANOVA, but often in regression as well. 3  It can be either continuous or categorical.
Protein Quality. Collagen is not a complete protein because it is lacking in the amino acid tryptophan. A Protein Digestibility Corrected Amino Acid Score (PDCAA) of a complete protein is 1.0.ollagen is a protein found in the muscle and connective tissue of animals. Hydrolyzed collagen protein supplements are typically made from the bones and skin of cows, horses or pigs.
Collagen and Hair Care. Collagen is a protein and most people associate collagen with skin. While it is true that collagen is the support structure for skin, giving skin its resilience. Collagen is a very important protein for our whole body including our hair. Collagen is one of the proteins found in most connective tissues, including cartilage, bone, and skin. Collagen is a protein that makes up about 30 percent of our body.