About Skin Whitening 

           Regardless of your ethnic background or skin color, eventually most of us will struggle with some kind of brown or ashen pigmentation problem. Skin will either appear lighter or darker than normal in concentrated areas, or you may notice blotchy, uneven patches of brown to gray discoloration or freckling. Skin pigmentation disorders occur because the body produces either too much or too little melanin. Melanin is the pigment produced by specific cells (melanocytes). It is triggered by an enzyme called tyrosine, which creates the color of our skin, eyes, and hair. (Melanin actually has two major forms that combine to create varying skin tones. Eumelanin produces a range of brown skin and hair color, while pheomelanin imparts a yellow to reddish hue.)

          Hydroquinone is a strong inhibitor of melanin production, meaning that it prevents skin from making the substance responsible for skin color. Hydroquinone does not bleach the skin, which is why calling it a bleaching agent is a misnomer as it can't remove pigment from the skin cell. Hydroquinone can only disrupt the synthesis and production of melanin hyper pigmentation, which is actually true of any skin-lightening ingredient. When you prevent melanin from being generated, as new skin cells are formed and move to the skin's surface, they do not contain the excess pigment (melanin), therefore reducing or eliminating these darkened areas.