Sunless Tanners in Dermatology: A Review of Ingredients, Efficacy, and Safety Profiles

Sunless tanners offer a safer alternative to ultraviolet (UV)-based tanning but may cause adverse skin reactions, including irritant and allergic contact dermatitis. This study examines the composition, efficacy, safety, and reported side effects of commonly used sunless tanning products.

The top 50 sunless tanners on Amazon's Best Sellers list (March 2025) were reviewed. After excluding bundles, applicators, and non-self-tanning cosmetics, 37 products were included. Ingredient lists were analyzed, and customer reviews were screened for reports of skin reactions using predefined keywords.

All products contained dihydroxyacetone (DHA), 38% included erythrulose, 11% contained melanin, and 5% included tyrosine derivatives. Only one product (3%) also contained sunscreen. On average, 1.96% of customer reviews mentioned skin reactions.

DHA remains the predominant active ingredient, with erythrulose, melanin, and tyrosine derivatives used less frequently. Emerging or less common agents such as troxerutin, melanotan, and melanoidins raise safety and regulatory concerns. Reported adverse effects include contact dermatitis and pigmentary changes, which may complicate dermatologic assessments.

While sunless tanners provide a UV-free tanning option, dermatologists should educate patients on ingredient safety, potential adverse effects, and proper application techniques. Given their minimal UV protection, patients should be advised to continue regular sunscreen use.