Cosmetic treatment process comprises contacting a composition (I) comprising mannoproteins, on skin and/or integument, where (I) does not contain polyphenols. Independent claims are included for: (1) cosmetic or dermatological composition comprising mannoproteins, preferably as an active substance/additive; and (2) the preparation of (I) comprising mixing mannoproteins with vehicle. ACTIVITY : Antiseborrheic; Dermatological. MECHANISM OF ACTION : None given.