The right shampoo for itching or dry scalps? Alpecin Sensitive Shampoo S1 is particularly mild and is therefore ideal for the daily care of sensitive and easily irritated scalps. Allantoin naturally protects against itching and inflammation whilst panthenol has a moisturising effect. The amino acid surfactants gently cleanse the hair and scalp. The skin activator helps the scalp to maintain and stabilise its barrier function. It protects the hair roots and strengthens the hair.