Bu Gu Zhi (Cullen corylifolium (L.) Medik., syn. Psoralea corylifolia L.), commonly known as Babchi or Bakuchi seed, is a traditional Chinese medicinal herb renowned for its Kidney-Yang tonifying, Spleen-warming, and essence-preserving effects. The dried seeds, with a bitter-acrid taste and warm nature, enter the Kidney, Spleen, and Pericardium meridians. In Traditional East Asian Medicine, it is prescribed for impotence, spermatorrhea, frequent urination, chronic diarrhea, lumbar weakness, vitiligo, psoriasis, and general deficiency or aging syndromes. Modern pharmacological studies have identified key bioactive compounds—bakuchiol, psoralen, isopsoralen, isobavachalcone, and various flavonoids and terpenes—responsible for its anti-inflammatory, antioxidant, osteogenic, immunomodulatory, and skin-rejuvenating properties. Bakuchiol, in particular, is widely used in dermatology and cosmetics as a natural alternative to retinol. Clinical and laboratory evidence also supports Bu Gu Zhi’s potential in improving bone metabolism, cardiovascular function, hormone balance, and anti-tumor activity. With its dual legacy of ancient wisdom and modern validation, Bu Gu Zhi stands as a bridge between traditional Oriental medicine and contemporary integrative health science. Proper dosage and caution are advised, as the herb should be avoided in patients with Yin deficiency with heat, urinary tract inflammation, or constipation.
