Overall, niacinamide can help build proteins in the skin and lock in moisture to prevent environmental damage.

• Immunity: Niacinamide helps build keratin, a type of protein that keeps your skin firm and healthy.
• Lipid barrier: Niacinamide can help your skin grow a ceramide (lipid) barrier which can, in turn, helps retain moisture. This is beneficial for all skin types, especially if you have eczema or mature skin.
• Minimizes redness and blotchiness: Niacinamide reduces inflammation which may help ease redness from eczema, acne, and other inflammatory skin conditions.
• Minimizes pore appearance: Keeping skin smooth and moisturized may have a secondary benefit — a natural reduction in pore size over time.
• Regulates oil: The benefits of moisture retention aren’t just for those with dry skin types. Niacinimide can also help regulate the amount of oil the sebaceous glands produce and prevent your glands from going into overdrive.
• Protects against sun damage: Niacinamide can concurrently rebuild healthy skin cells while also protecting them from damage caused by ultraviolet rays.
• Treats hyperpigmentation: Niacinamide concentrations can be helpful in lightening dark spots. Benefits were seen after four weeks, but not beyond two months. This benefit may be due to increased collagen production.
• Minimizes fine lines and wrinkles: Helpful in reducing some signs of sun damage that come with aging. This includes fine lines and wrinkles.
• Protects against oxidative stress: Niacinamide helps build cells in the skin while also protecting them from environmental stresses, such as sunlight, pollution, and toxins.
• Treats acne: Niacinamide may be helpful for severe acne, especially inflammatory forms like papules and pustules. Over time, you may see fewer lesions and improved skin texture.