黑色素形成的原因:黑斑、雀斑是由於黑色素不正常地沉淀於皮膚上而引起的。

黑色素形成的原因:
黑斑、雀斑是由於黑色素不正常地沉淀於皮膚上而引起的。黑色素是由於受紫外線等刺激，酪氨酸鹽被活性化後而生成酪氨酸，此時生成大量的黑色素，或黑色素排泄功能失調，黑色素存留於皮膚而形成了黑斑和雀斑。

結果 (英文) 1:

Melanin causes:Dark spots, freckles are caused by abnormal deposition of melanin in the skin. Melanin is as stimulated by UV, salt is generated after activation of tyrosine tyrosine, generate large amounts of melanin, dysfunctional or excretion of melanin, melanin contained in the skin and the formation of dark spots and freckles.

結果 (英文) 2:

The reason the formation of melanin:
dark spots, freckles are not normally due melanin deposited on the skin caused. Melanin is due to ultraviolet light and other stimuli, tyrosine salts generated after being activated tyrosine, then generate a lot of melanin or melanin excretion dysfunction, retention melanin in the skin and the formation of dark spots and freckles.

結果 (英文) 3:

The reason for the formation of melanin spots and freckles:
is due to abnormal precipitation of melanin in skin caused by. Melanin is due to ultraviolet ray stimulation and tyrosine salt is activated and generate tyrosine, then generate a lot of melanin, or melanin excretory dysfunction, melanin retained in the skin and the formation of dark spots and freckles.