What does DHA stand for in spray tanning solutions?

DHA stands for Dihydroxyacetone, which is the active ingredient commonly used in spray tanning solutions. This compound is a simple sugar that interacts with the amino acids in the skin's surface layer, resulting in a brown pigment that simulates a tan. The process begins when DHA reacts with these amino acids, undergoing a chemical reaction known as the Maillard reaction, which produces the characteristic bronzing effect.

Understanding the role of DHA is crucial for those in the tanning industry, as it allows them to advise clients on the expected results, proper application, and aftercare to maintain the tan. The other options listed are incorrect because they either do not refer to a recognized component of spray tanning solutions or misname the chemical structure associated with the tanning process.