Neostrata Post-Acne Mark Correcting Serum

Niacinamide is a form of vitamin B3 that supports the skin barrier. Over time, it can help improve the appearance of uneven tone and redness. How much difference it makes depends on the concentration, the rest of the formula and whether the product is left on the skin or is rinsed off.

Evidence for topical use in melasma is promising, but it should be viewed as one supportive part of a broader plan rather than a standalone treatment.

Ascorbyl Glucoside is a water-soluble derivative of vitamin C designed to be more stable and less irritating than pure ascorbic acid. Once applied, it is gradually converted into active vitamin C within the skin. Laboratory studies support its antioxidant activity, and small clinical studies suggest it may help improve brightness and uneven pigmentation with consistent use. However, its effects are generally milder compared to high-strength pure vitamin C. It is commonly used in formulations aimed at supporting radiance and protecting the skin from environmental stress.

Liquorice Root Extract contains compounds such as glabridin and liquiritin, which are associated with calming and pigment-regulating effects. There is moderate evidence, including small clinical studies, suggesting it may help reduce the appearance of hyperpigmentation and redness. Laboratory data also supports its anti-inflammatory and antioxidant activity. While results are generally milder than prescription treatments, it is well tolerated and commonly used in formulations designed for sensitive, reactive or uneven skin.

NeoGlucosamine (N-acetyl glucosamine) is an amino sugar that plays a role in the skin’s natural support structures, including hyaluronic acid production. Early clinical studies suggest it may help improve skin texture and reduce the appearance of hyperpigmentation, particularly when combined with other active ingredients. It also provides very mild exfoliating effects and may support hydration. While results are promising, much of the published data is manufacturer-sponsored, and more independent large-scale studies would help clarify the extent of its benefits.