Corpore Sano Oily Hair Shampoo is astringent and helps to reduce oil production on the scalp. The result of excess sebaceous secretion is greasy, dull and weighed-down hair. Oily hair is a very common condition, caused by the sebaceous glands of the scalp generating excess sebum. Oily hair should be washed with astringent but gentle ingredients that maintain its balance, to avoid a possible rebound effect that would increase sebaceous production. Certified-organic green Nettle purifies the hair, cleanses the scalp, helps to reduce oil and prevents hair loss caused by seborrhoea. Certified-organic Witch Hazel acts as a conditioner, revitalising hair. It is mildly astringent, helping to regulate excess oil. Its action combined with a cleansing base of mild plant-based surfactants offsets sebaceous gland imbalances, resulting in well-balanced, purified hair.