Choline is customary classified as a vitamin. It belongs to the family of water soluble B-vitamins. It was formerly known as the vitamin B4.
Like other vitamins, it plays a significant role in nutrition, but its daily requirement seems to be hundreds of times greater than that of other vitamins.
Choline has three essential metabolic functions:
As a constituent of lecithin, it is important for the construction of the cellular membrane and for the transport of lipids from the liver – thus preventing fat accumulation in that organ.
As a precursor in the synthesis of the neurotransmitter acetylcholine, interacting in muscle control.
As a source of labile methyl groups, which are essential for numerous biological processes and therefore an important factor for healthy growth.