I action whitening products are also called depigmenting . These applications are aimed at limiting skin blemishes such as freckles, dark spots, freckles, red spots, sometimes due to aging.
These products must be formulated very carefully for the duration of exposure on the skin, should not cause irritation, should be well tolerated, should have a pH between 4 and 6 and should not be used on children.
The depigmenting are of two types: those that suppress the activity of the melanin and those that interfere with the biosynthesis of melanin through enzymatic inhibition or competition with the substrate.
These products involved in cell turnover of the stratum corneum, giving a mild exfoliating action, increasing the speed of renewal of skin cells, accelerating the removal of the treated areas of hyperpigmented keratinocytes, which are quickly replaced by cells that contain less amount of melanin and therefore have lighter color.
Among the suppressors of melanin are the Alpha-hydroxy acids the Chamomile, l ' Althea, the' glycolic acid and lactic .
Among the inhibitors of melanin biosynthesis are the ' kojic acid, l' azelaic acid, licorice the , the ' bitter orange, the' angelic , the ' barley, the propolis, the resveratrol, the ' arbutin.
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