Seboregulating Shampoo with Nettle Extract (Greasy Hair) Shampooing seboregulateur a l extrait d ortie. Cheveux gras. With its sterol content, normalises the activity of the sebaceous glands. A new specific cationic polymer delays the migration of sebum onto the hair shaft and gives volume to the hair. With its very gentle emulsifying base, this formula allows frequent use, without a rebound seborrhoea effect. Hair is silky, soft and light.