DrDoob
Well-Known Member
Lecithin can also be classified as a penetration enhancer. This means it has the ability to deeply penetrate through the layers of skin, enhancing the penetration of other active ingredients. In aqueous solution, its phospholipids can form liposomes, a spherical structure in which the acyl chains are inside and not exposed to the aqueous phase. According to an article published in the International Journal of Toxicology, liposomes are considered effective in capturing other compounds inside their spherical structure and delivering any such captured compound through the skin barrier. This property of lecithin is also utilized by the pharmaceutical industry to enhance the penetration of a drug through the skin and across other biological membranes, such as intestinal, buccal, rectal, and nasal.
Not totally sure what all that means but it sounds like a good addition to topicals to me.