Kelual DS treatment shampoo has a patented synergy of active ingredients that provides fast, long-lasting relief of all symptoms of seborrheic dermatitis: scales, inflammation and itching. exacerbation period: 3 times a week for 2 weeks. maintenance phase: 1 time a week. use: using Kelual DS shampoo 1 application per week as maintenance, offers long-term prevention of the reappearance of dandruff. in case of contact with the eyes, rinse with plenty of water. clinical studies: -80% itching sensation*. -89% in the severity of the appearance of plaques*. +74% improvement in quality of life**. * tolerance and efficacy study in 62 people at 15 days. ** tolerance and efficacy study in 62 people at 1 month.