Displaying 6 results of Tretinoin Stable Isotopes Tretinoin stable isotopes are isotopically labeled versions of tretinoin, a medication used to treat acne and reduce the appearance of fine wrinkles and dark spots. These stable isotopes are used in pharmacokinetic and pharmacodynamic studies to track the metabolism and distribution of tretinoin in the body. They are also used in drug development and quality control testing to ensure the purity and stability of tretinoin formulations.