Chaste tree, also called Vitex agnus-castus, helps balance female hormones. Women reach for it to steady irregular menstrual cycles and calm PMS symptoms like breast tenderness and bloating. The berries supply the active ingredients, and many supplements standardize those compounds.
Most people take their dose daily, often in the morning. The herb works on the pituitary gland and nudges progesterone and estrogen back toward equilibrium. Wait through several full cycles before judging results.
Side effects stay mild for most users. Digestive upset, headaches, or skin reactions can happen. Skip chaste tree if you are pregnant or breastfeeding.