: For high-grade chemical needs (96% purity or higher), specialized distributors like Thermo Fisher Scientific and Sigma-Aldrich offer DHA in milligram quantities. These products are typically designated for research use only.
Dehydroascorbic acid (DHA) is the oxidized form of Vitamin C (ascorbic acid). While it is often viewed as a sign of degradation in consumer skincare products, it serves as a critical research compound due to its unique ability to cross the blood-brain barrier. Sourcing Dehydroascorbic Acid dehydroascorbic acid buy
: Unlike standard Vitamin C, DHA is actively transported into cells via glucose transporters (GLUTs). Once inside, the body typically reduces it back into active ascorbic acid. : For high-grade chemical needs (96% purity or
: In the context of topical serums, the presence of DHA (indicated by a change to orange or brown color) usually signifies that the product has oxidized and lost its antioxidant efficacy. In these cases, it may even act as a pro-oxidant, potentially irritating the skin. While it is often viewed as a sign
: While rare as a standalone consumer product, some specialized formulations, such as the Virt-C DHA prescription dietary supplement, incorporate DHA precursors or metabolites under medical supervision. Key Considerations for Buyers
: DHA is significantly less stable than L-ascorbic acid. It is often shipped as a lyophilized (freeze-dried) powder and must be stored at temperatures as low as -20°C to prevent further decomposition into 2,3-diketogulonic acid.