Bitter Leaf / Ewuro

Vernonia amygdalina (Bitter Leaf) is one of the most widely used medicinal plants in sub-Saharan Africa, particularly in Nigeria, Cameroon, and the DRC. It contains sesquiterpene lactones (vernodalin, vernolide, hydroxyvernolide) and steroid glycosides (vernonioside B1, B2) that demonstrate potent anti-proliferative activity against breast, colon, cervical, and lung cancer cell lines. Vernodalin induces G2/M cell cycle arrest and apoptosis via mitochondrial pathways. Remarkably, chimpanzees have been observed self-medicating with Vernonia when sick — a rare example of animal ethnobotany validating human traditional use. Clinical evidence is still emerging, but multiple African universities are conducting trials.