DERCOS DS DANDRUFF TREATMENT OBSERVATIONAL STUDY 2022

Inclusion Criteria: * Patients with dandruff or seborrheic dermatitis * All hair types * All ethnicities (Asian, Caucasian, Afro-American, African, Hispanic) * Including patients with specific occlusion habits (for instance veil use at least 8 hours per day, hat use) * Patients willing to provide written informed consent Exclusion Criteria: * Under 12 years old * Pregnancy, breast feeding, childbearing potential without adequate contraception, or irregular menstrual cycles. * History of allergy, anaphylaxis or hypersensitivity to any of the ingredients of Shampoo any of the ingredients of DERCOS ANTI-DANDRUFF normal to oily hair shampoo * History of allergic contact dermatitis secondary to shampoo, conditioner, mask, and/or leave-in. * Has any clinical manifestations in the treatment(s) or other disorders that, in the opinion of the investigator, may affect the evaluations or results of the study products.- Inability to stay the study period (56 days +-5 days) without performing any hair/scalp procedure, including coloring, straightening and cutting. * Inability to attend all study visits and follow treatment regimen