Self-tanners include in their formula dihydroxyacetone (DHA) , a derivative of sugar cane which, according to pharmacist Felipe Martín, owner of the Galileo 61 pharmacy , “when applied topically to the skin, reacts with amino acids (protein fractions) present in it, forming compounds called melanoidins. Their chemical structure is very similar to that of melanin , our skin’s natural coloring, so they are capable of giving that tanned tone. It is a very safe compound, which is not absorbed into the bloodstream and therefore cannot cause any systemic side effects ».
Self-tanner does not stain the skin like makeup but acts by a chemical reaction , and that is why it does not go away in the shower, in the pool or in the sea. The new formulas do not stain clothes either. The tan begins to be visible after 2-3 days . If it continues to be applied, the skin tone will intensify. If you stop applying it, it will go away gradually , without leaving hives or marks. Pharmacist Felipe Martín explains that “the tan will disappear as days go by, generally from 4 to 7 days, which is the time that the cells of the outermost layer of the skin take to shed as part of thenatural skin renewal process ». It can also be removed earlier by exfoliating the skin.