Lecithin is the most abundant of the phospholipids. It is a fatty food substance, which serves as a structural material for every cell in the body. It is an essential constituent of the human brain and nervous system. It forms 30 percent of the dry weight of the brain and 17 percent of the nervous system.

Lecithin is also an important component of the endocrine glands and the muscles of the heart and kidneys. It makes up 73 percent of the total liver fat. Nervous, mental, or glandular overactivity can consume lecithin faster than its replacement. This may render a person irritable and exhausted. It is, therefore, of utmost importance to add lecithin to the diet, if the body