Soyathin, a soybean derived lecithin, is a phospholipid compound of fatty acids, glycerine, phosphoric acid and choline. It is an important component of cell membranes in humans, animals and vegetables. Lecithin can be obtained from various vegetable oils - such as soybean, sunflower or rapeseed oil - as well as from eggs. The phospholipid composition varies depending on the lecithin's origin.

Soyathin liquid is a clear, amber-coloured, viscous fluid. It is produced by drying and filtration of hydrated crude soybean oil gum, which is obtained in the oil-refining process. It consists of natural phospholipids in their original relative proportions and soybean oil. Compared to lecithins from other sources it has a significantly higher level of linolenic acid and lower level of oleic acid.