2. If an active ingredient is chirally correct; that is, if it has the right optical activity so as to be recognized and "fit" the chemistry of the human body, it will do the job nature designed it to do.
"Chiral incorrectness" and the use of petroleum byproducts are the two principal reasons that mainstream skin care really can't offer any hope of delivering meaningful results.
The science of optically corrected organic compounds is called chirality and the science of chirality is said to have started with Louis Pasteur, who discovered that biologically active molecules often occur in two mirror-image forms called isomers or simply, "hands".
These "hands" can be visualized as "sides" in which the only similarity is that they look the same.
Although they are stereo images of each other, the chirally correct side has a positive result but the chirally incorrect side can have negative results in cosmetic compounds.
The process of unzipping or separating these two sides is called chiral resolution, and the end result is that the chirally correct side can be isolated and used in highly beneficial ways, and the dangerous, harmful side can be discarded.
Some cosmetic companies claim to be producing cosmeceauticals that are "pharmacologically active products" which "blur the line between cosmetics and pharmaceuticals".
The biochemistry of the human body is said to have become increasingly chirally selective and chirally pure which is partially a result of environmental attack and toxin overload.
Chiral skin care is so advanced; that it effectively renders any other approach obsolete!