Many substances do pass into the body from the outer surface of the skin and into the circulation.
To understand how this works, imagine a tightly woven fabric. While from a distance it may appear impervious, at close range it is actually highly porous. It is this porous nature of the skin, with its millions of tiny openings, that allows not only sweat and other toxins to escape, but also enables the absorption of some substances.
The process is known as dermal absorption. Once a substance passes through the outer layers of skin, it passes into the lymph and local vascular (blood vessel) system and soon after into the bloodstream.
While the exact mechanisms of skin transfer are yet to be completely understood, three routes of penetration have been hypothesized:
- Intercellular Skin Absorption, which occurs between the cells of the “stratum corneum”, the outermost layer of the skin
- Transcellular Skin Absorption, where substances actually pass through the skin cells themselves
- Skin Absorption Through the Follicles and Glands, also known as ”appendageal absorption”, which may also exhibit ”reservoir effects” in which substances may be stored within the glands for absorption over time
Humans have been using the skin as a direct pathway into the body for centuries, and only recently have we begun to understand the science behind it. Nano Blanc transdermal skin whitening patches work by lightening your skin from the inside.