Another function of fat is to convert carotene to vitamin A. Fat also helps keep organs in place by surrounding them in a layer of fat. Fat also surrounds the body in a layer that preserves body temperature and keeps us warm. One other function of fat is to slow the production of hydrochloric acid thereby slowing down digestion and making food last longer. Some sources of fats are meats and nuts as well as just plain oils and fats. Proteins, besides water, are the most plentiful substance in the body.
Protein is also one of the most important element for the health of the body.
Protein is the major source of building material in the body and is important in the development and growth of all body tissues. Protein is also needed for the formation of all hormones. It also helps regulate the body's water balance. When proteins are digested they are broken down into simpler sections called amino acids. However, not all proteins will contain all the necessary amino acids.