What are the effects of niacinamide on the skin?

The effects of niacinamide on the skin are mainly reflected in the following aspects: 1. Protecting the skin barrier—niacinamide enhances epidermal barrier function, reducing water loss and damage from external environmental factors. 2. Inhibiting melanin production and reducing pigmentation, effectively lightening dark spots and improving uneven skin tone. 3. Minimizing the appearance of pore size and density, resulting in smoother and finer-looking skin. 4. Providing antioxidant benefits that help slow down the skin aging process and maintain a youthful appearance. 5. Alleviating inflammatory responses associated with skin conditions such as acne and rosacea, thereby aiding skin recovery.