Agnus Castus, also known as vitex agnus castus (VAC) or chasteberry, has become well-known as a female hormonal regulator . It is extremely helpful in a wide range of pre-menstrual problems such as spots, irritability, breast tenderness, premenstrual migraine and bloating. It can help regulate woman's menstrual cycle, improve fertility, lengthen out a short cycle and even restore menstruation in a woman who has stopped her periods. For women entering the menopause, it can help to even out mood swings and improve hot flushes. Men can use agnus castus too for acne.