Fats are a part of every cell in your body. They provide a concentrated source of energy for our bodies and assist in the transport of fat-soluble vitamins (A, D, E and K) to the small intestine for digestion. Fats slow digestion so that you feel full for a longer period of time. Fats give food flavour and mouth-feel. They also act as a tenderizing agent in baked products and a heat transfer medium in frying foods. Fats and oils are made up of basic units called fatty acids. Fatty acids are the basic building blocks of fats just as amino acids are the building blocks of protein. Each type of fat is a mixture of different fatty acids. Certain fatty acids known as Essential Fatty Acids (EFAs) are necessary for such functions as cell building and hormone production. EFAs cannot be produced by our body, so must be supplied in the diet. They can be found in fish, wheat germ and many vegetable oils.