The topical cosmetic compositions and methods ofthe subject invention can be used to treat and/or prevent a varietyof skin conditions, including, for example, age spots, acne, scars,body odor, aging-related conditions (e.g., wrinkles, looseness anddryness), and scalp issues (e.g., dandruff, seborrheic dermatitis andhair loss). In preferred embodiments, the compositions accordingto the subject invention comprise biological amphiphilic moleculesproduced by microorganisms.