Use the Ascorbic Acid crystals while in the shower or bath as an exfoliating scrub. Use a sponge or your fingertips to massage some of the crystals directly into the skin on the face and/or body to exfoliate. Rinse thoroughly.
For use in serums or other formulations, we recommend our Fine Ascorbic Acid powder.
Question: What is the difference between L and D ascorbic acid?
Answer: Some molecules exist in mirror forms (L and D). These molecules have at least one asymmetric carbon atom, i.e. a carbon atom that has each of its four bonds occupied by four different atoms or groups of atoms. Ascorbic acid is one such molecule. L-ascorbic acid means that the compound's stereochemistry is related to that of the levorotatory enantiomer of glyceraldehyde.
Regarding chirality of ascorbic acid and skin care, there are two questions:
Question: Does it matter whether a chemical is D or L?
Answer: Yes, it does, because the special distribution of atoms is part of the structure of the chemical and will determine some of its properties.
Question: Does it matter whether you are using the L- stereoisomer or a racemic mix of ascorbic acid on your skin?
Answer: No, although the ascorbic acid we use and sell at Skin Actives is pure L-.
When no enzymes are involved, either isomer will do. You need a minimal amount of L-ascorbic acid, a cofactor for enzymes involved in the hydroxylation of procollagen amino acid residues. A racemic mix of ascorbic acid will have more than enough L-isomer to do the job. Our ascorbic acid is the L-stereoisomer, very fresh (reduced) and in very fine crystals so that it can do a better job.