Niacinamide

Niacinamide is an incredibly versatile and efficient skin care ingredient that acts against a wide array of problems. This water-soluble vitamin, present in such foods as meat, fish, and grains, is artificially produced for cosmetic purposes. As an active anti-age ingredient, niacinamide is normally used in 4-5% concentrations and stimulates collagen, keratin, filaggrin, and other protein production, thus making skin more firm and less wrinkled. Niacinamide's continuous use for 8-12 weeks has clinically improved the skin's texture and reduced the look of fine lines.
Besides this, the molecule acts very potently on skin lightening. The transfer of melanin between skin cells is inhibited, hence lightening hyperpigmentation and dark spots, which would be visible after about 8 weeks of daily use in concentration at 2-5%. Niacinamide can be combined with other skin-whitening agents such as vitamin C or kojic acid for enhanced effectiveness.
This active is also excellent for reinforcing skin barrier function by enhancing the synthesis of critical lipids, including ceramides and acids. In turn, this improves skin hydration, reduces trans-epidermal water loss, and yields a healthier, more resilient skin barrier. Even at relatively low concentrations, for example, 2%, niacinamide supports the skin's barrier function.
Given that niacinamide possesses anti-inflammatory and oil-regulating properties, it is also good for blemished skin. Indeed, 4% niacinamide has, in studies, been seen to reduce acne significantly, with results comparable even to those from traditional antibiotic treatments. Beyond these primary benefits, niacinamide supports wound healing, improves smoother skin texture, offers photoprotection, and may even be useful for inflammatory skin conditions like rosacea and atopic dermatitis.
Bottom line: niacinamide is an incredibly useful ingredient that effectively targets many different skin concerns, from the signs of aging to hyperpigmentation, acne, and damaged skin barrier restoration.