In a study, 62 dermatologists agreed on only 23 topical cosmetic ingredients that work on seven skin concerns- fine lines and wrinkles, acne, redness, dark spots, large pores, dry skin and oily skin. The 23 ingredients include azelaic acid, benzoyl peroxide, glycolic acid, mineral sunscreen, niacinamide, etc. The study was published in the Journal of the American Academy of Dermatology.