The building blocks of the fat in our bodies and in the food we eat. They are carboxylic acid with a long aliphatic chain, which is either saturated or unsaturated.
A group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids.