Dihydroxyacetone (DHA) is derived from sugar beets or cane sugar and is the commonest active ingredient used in self-tanning products. The skin-browning effect is the result of a nontoxic chemical reaction between DHA and the amino acids in the skin’s surface,
Can be added to formulations as is, usual final concentration 2-12%, lower concentration for lighter tan or face, higher concentration for darker shade and body. DHA may lose its tanning effect (or induce discolorations) when combined with alpha-hydroxy acids, titanium dioxide, zinc oxide, iron oxide pigments, or certain perfumes. Avoid using amino acids, proteins, peptides, EDTA as these ingredients can trigger the chemical reaction within the product that produces the tan.
Final product should be in the pH range between 3.5 and 5, as this will prevent it from early degradation. Usually combined with erythrulose for a deeper, natural looking tan. For external use only.
Store in a cool place away from direct sunlight. Ideally store in the refrigerator, tightly sealed to prevent moisture absorption.