All-trans-3,4-Didehydro retinoic acid (3,4-DHRA) is an active compound that regulates gene expression by binding to retinoic acid receptors (RAR), subsequently activating them. It plays a crucial role in the development and differentiation of the skin, offering potential anti-tumor and anti-inflammatory properties. Additionally, all-trans-3,4-Didehydro retinoic acid is under investigation for its ability to suppress various diseases, including skin disorders and certain types of cancer.