Heading to the beach or pool this summer? Here's what experts say you need to know about sunscreen and tanning first.

In 2013, Merck KGaA launched a non-dihydroxyacetone-based self-tanning product called RonaCare Bronzyl that works by enhancing a person’s melanin production.

The most popular options for sunless tanning are sprays and creams containing dihydroxyacetone (DHA), a Food and Drug Administration-approved color additive.

Dihydroxyacetone was approved by the Food and Drug Administration in 1973 for use in self-tanning lotions, which are applied directly to the skin and not inhaled.