4 Serum (!!!) forms acid - 0.05% retinol, salicylic 2%, 1% and 5% azelaic breast. The consistency - jelly water, transparent, with a very sharp chemical smell. I confess that the smell of a killer, but the only drawback is forgivable in comparison with the funds efficiently. Apply on clean and dry face only in the evening, tightens the skin, closes the pores, lightens the overall complexion, acne does not form (combats appeared very active). For the first time can cause redness, dryness and peeling, so be sure to use a moisturizer after drying agents on the face. This serum perfectly coexists with any care, instantly absorbed and does not leave an unpleasant film on the face. I Recommend - DAA !!! Obscure bodyguard your skin purity ..))