Sunless tanning products may contain anywhere between 1 to 15 percent DHA
; the higher the DHA
level, the darker the tan produced.
of sunless tan products claim that DHA is a simple carbohydrate sugar solution but a toxicologist who investigated the harmful effects of tanning beds disagrees. Even the FDA has not approved the use of DHA in spray tan booths.
The FDA previously approved the use of DHA as an ingredient in tanning products but strictly for topical application only.