How Does Dihydroxyacetone (DHA) Work in Self Tanner?

When applied to the skin, this tanning agent reacts with the amine functions carried by the amino acids present in the dead cells of the stratum corneum to form pigments, the melanoidins. The skin's browning effect results from this reaction, called the Maillard reaction.

The pigmentation of the skin appears within 2 to 6 hours after the application of the self-tanning treatment. However, this color gradually fades and disappears completely in 5 to 7 days. This phenomenon is explained by the frequent renewal of the horny layer (natural process of desquamation). Thus, this method of tanning without exposure to the sun does not cause the production of melanin and therefore has no protective effect against UV radiation. Self-tanning does not mean sun protection! Always remember to protect your skin with a broad-spectrum sunscreen to avoid the harmful effects of UV rays.

So, is self tanner bad for you? 

In self-tanning products, Dihydroxyacetone is regulated at a maximum concentration of 10%.

The Scientific Committee on Consumer 

Safety (SCCS) has stated that DHA in 

self-tanning products does not pose a 

health risk to consumers at a 

maximum concentration of 10%. 

In addition, no scientific study has proven that DHA penetrates the skin's protective barriers. It is not contraindicated for pregnant women.

On the other hand, a self-tanning product containing dihydroxyacetone can have side effects like irritation if applied to sensitive parts of the body. For this reason, all parts of the body covered with mucous membranes should be free of self-tanner. Furthermore, inhalation and ingestion of this type of care is not recommended and related with important side effects, as it can cause asthma as well as DNA damage and cancer risks.

In addition, the ingredient can dry out the skin and increase its sensitivity to the sun. Note that this characteristic is often counterbalanced in DHA self tanner formulas by the presence of humectants such as glycerin and sugar derivatives. To combat this potentially drying effect, make sure you moisturize your skin daily, morning and night, both on your face and body. The 9-ingredient face moisturizer is enriched with hyaluronic acid and coconut oil. It is a minimalist formula that moisturizes and nourishes the epidermis. Its light and non-greasy texture is suitable for dry, normal and combination skin, even sensitive skin. For the body, choose the 10-ingredient moisturizing body cream, which moisturizes all skin types, even sensitive.