Bakuchiol
Bakuchiol is a naturally derived organic compound (CAS #10309-37-2) isolated from the seeds of Psoralea Corylifolia (Babchi plant), a plant used in Indian and Chinese medicine. Although chemically unrelated to the vitamin-A/retinoid family, comparative gene expression profiling shows it regulates skin cell behavior in a manner similar to retinol. It is also known by trade names such as Sytenol A and is sometimes referred to as "Phyto Retinol." Its official CosIng functions include antimicrobial, antioxidant, emollient, and skin conditioning.
Bakuchiol upregulates collagen I, III, and IV production and downregulates MMP (collagen-degrading enzyme), supporting firmer, more wrinkle-free skin. A 12-week clinical study (0.5% formula) showed significant improvement in lines, wrinkles, elasticity, firmness, and photo-damage, and a 2018 double-blind study found it comparable to 0.5% retinol for photoaging with better tolerability. It also demonstrates anti-acne effects through multiple mechanisms including sebum regulation, antibacterial activity against P. acnes, anti-inflammatory action, and inhibition of lipid peroxidation, as well as potential hydration and melanin-inhibiting properties.
Evidence base is still limited compared to well-established retinol; the source recommends using Bakuchiol alongside retinol rather than as a direct replacement given the relatively small clinical studies to date. No retinol-like side effects (e.g., irritation, photosensitivity) were reported in the cited studies, but long-term safety data are not yet as robust as for retinoids.
