這個是一個黃條，那危害是什麽呢。

About LECITHIN: Lecithin is a naturally ocurring lipid found in both plants and animals. According to the PETA's Caring Consumer guide, lecithin for com mercial purposes is most commonly obtain from eggs and soybeans.

This ingredient may be derived from animals. From PETA's Caring Consumer: Waxy substance in nervous tissue of all living organisms. But frequently obtained for commercial purposes from eggs and soybeans. Also from nerve tissue, blood, milk, corn. Choline bitartrate, the basic constituent of lecithin, is in many animal and plant tissues and prepared synthetically. Lecithin can be in eye creams, lipsticks, liquid powders, hand creams, lotions, soaps, shampoos, other cosmetics, and some medicines. Alternatives: soybean lecithin, synthetics.

http://www.ewg.org/skindeep/ingredient/703513/LECITHIN/

在黑色素合成之后，抑制黑色素小体转移

Reference：药妆品学 Cosmeceuticals, 2nd edition