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

PAULA'S CHOICE:
Also known as vitamin B3 and nicotinic acid, niacinamide is a very effective skin-restoring ingredient that offers multiple benefits for aging and blemish-prone 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 and to some extent help visibly repair damage from UV light and offset other sources of environmental attack, including the negative impact of various types of airborne pollutants. Unlike many beneficial ingredients, niacinamide is stable in the presence of heat and light.

https://www.paulaschoice.com/ingredient-dictionary/skin-soothing/niacinamide.html?fdid=ingredient-dictionary&crefn1=name-first-letter&crefv1=N&csortb1=name&csortd1=1

聽說這成分會長毛?