烟酸缺乏症也可以引起皮肤上的爆发在很大程度上与棕色色素沉着，面对湿疹型，前臂和腿部。

Niacin deficiency can also cause an eczema type of skin eruption with brown pigmentation, largely on the face, forearms and legs.

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烟酸缺乏症也可以引起皮肤上的爆发在很大程度上与棕色色素沉着，面对湿疹型，前臂和腿部。

Niacin deficiency can also cause an eczema type of skin eruption with brown pigmentation, largely on the face, forearms and legs.

youdao