1. the formation process of spots: melanin bodies carry melanin, and they are transferred from melanocytes to dendrite terminals to keratinocytes. They move upward along the keratinocytes to the epidermis.
2. the internal causes of melanin are affected: tyrosinase is active, the more active, the more active, and the speed of melanin synthesis is increased. The composition of copper ions is used as a coenzyme.
3. the external cause of melanin: ultraviolet. Environmental air pollution, poor cosmetics, endocrine disorders, estrogen, androgen and progesterone imbalance and other factors will stimulate the activity of melanocytes and increase melanin.
Alpha arbutin: 98%
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