All BIODERMA products are formulated according to the ecobiology principles, which is at the heart of NAOS approach to respect the skin ecosystem and preserve its health lastingly. Sébium Gel moussant gently cleanses and purifies the skin without drying it : containing zinc sulphate and copper sulphate, it cleanses the epidermis, reduces the number of blemishes, and limits sebum secretion. Its ultra-gentle, soap free formula respects the skin's balance : the physiological pH is maintained. The patented natural complex raised the skin's tolerance threshold. Facial cleansing is the first essential step of any skincare routine. Considering that the face is the most important part of the body for 60% of women, this step should not be neglected. It rids the skin of impurities that have accumulated (sebum, perspiration, dead cells, bacteria, cosmetics, solar filters, make-up, dust and other particulate pollutants), in order to prepare the skin for other treatments. Without this essential cleansing in the morning and evening, the skin becomes asphyxiated: the hydrolipidic film no longer plays its protective role and pores become clogged. As a result, blemishes (blackheads and spots) appear and the complexion is dull and uneven. For combination or oily acne-prone skin, cleansing is even more important since there is excess sebum. Cleansing should eliminate all impurities without attacking the skin. Limits sebum secretion 68% decrease immediately after use (1) Purifies Purified skin: 100% (1) Anti-blemish efficacy 23% decrease in the total number of acne lesions (2) Limits sebum secretion 37.5% decrease after 28 days (1)