To date, hydroquinone is the most effective bleaching agent, the use of which, however, caution should be exercised. Hydroquinone exhibit selective toxicity with respect to melanocytes, reversibly inhibiting the synthesis of DNA and RNA. The higher the concentration of hydroquinone in the bleach, the greater its effect on melanocytes, but the higher the probability of its toxic effect on the skin cells. The most commonly used practice of cosmetic preparations -e 1-2% hydroquinone 4% th permitted concentration in some cases. Since hydroquinone well penetrates the skin and can be absorbed into the blood, it can not be used during pregnancy and lactation. Most authors do not recommend the use of drugs gidrohinonsoderzhaschie more than two years. If, within 6 months is observed beneficial effect, proceed to other bleaching agents. About me: I'm 31, the skin oily / normal, dilated pores, age spots are present, periodically there are eruptions. Used in describing 2X2 week for two months. Two years ago, because of nerves I strongly deteriorated skin rashes right now is not big, but a lot of scars from old acne and uneven. Brown spots almost completely gone. Scarface harder cream works, but very, very slowly, not a magic unfortunately) If you had my review helpful, please click "Yes" below. Thank you!