12α-Hydroxysteroids are a class of steroid hormones characterized by the presence of a hydroxyl group at the 12α position. These compounds play crucial roles in various physiological processes, including immune modulation and inflammatory response regulation. They can be synthesized from their precursors through specific enzymatic reactions catalyzed by 11β-hydroxysteroid dehydrogenase (11β-HSD) or other enzymes in the steroid metabolism pathway. The presence of a hydroxyl group at this position influences their bioavailability and receptor binding affinity, thereby modulating their biological activities. Research into 12α-hydroxysteroids has revealed their potential as therapeutic targets for conditions such as autoimmune diseases, inflammation, and certain metabolic disorders.