還有美白的作用

Also known as vitamin B3 and nicotinic acid, niacinamide is a very effective skin-restoring ingredient that offers multiple benefits for aging skin. Among these benefits is the ability to visibly improve the appearance of enlarged pores, uneven skin tone, fine lines, dullness, and a weakened skin surface. Niacinamide can also mitigate the damage environmental attack can cause, and is stable in the presence of heat and light.

Source: Paula´s Choice.

在黑色素合成之後，抑制黑色素小體轉移

Reference：藥妝品學 Cosmeceuticals, 2nd edition

Niacinamide is an essential B vitamin that helps soothe skin.

Niacinamide, also called nicotinamide and vitamin B3, is a water-soluble vitamin. Working with the substances naturally found in the skin, niacinamide can help repair a compromised skin barrier while improving the appearance of skin.

Niacinamide causes painfull cystic acne in my skin. :(

美白、抗痘、抗老、增強皮膚障壁、舒緩

邱品齊：菸鹼胺(維他命B3)真相大公開、邱品齊醫師分享 維他命B3的五大功效
https://skindocchiu.pixnet.net/blog/post/350855509-%E8%8F%B8%E9%B9%BC%E8%83%BA(%E7%B6%AD%E4%BB%96%E5%91%BDb3)%E7%9C%9F%E7%9B%B8%E5%A4%A7%E5%85%AC%E9%96%8B

https://www.youtube.com/watch?v=SuS5mfRMUmk