ANUA — Niacinamide 10 TXA 4 Serum 30ml

This serum is one of the most comprehensive in the catalog for spot correction. Its formulation architecture is coherent and multi-mechanism: 1. Niacinamide 10%: inhibits melanosome transfer. The 10% concentration is at the high end of the typical range (5-10%) — some individuals may experience an initial flush on very sensitive skin. ANUA's "Low Irritation tested" formula reassures about overall tolerance. 2. TXA 4%: tranexamic acid — inhibits the binding between melanocytes and keratinocytes. Less irritating than hydroquinone, more versatile than arbutin alone. The simultaneous presence of TXA and arbutin covers two distinct mechanisms in the melanogenesis pathway. 3. Double Arbutin (β + α): Alpha-Arbutin is approximately 10× more potent than β-Arbutin for tyrosinase inhibition. The two forms in the same serum represent a nuanced formulation that differentiates this product from competitors that use only one form. 4. 3-O-Ethyl Ascorbic Acid: a stable derivative of vitamin C (more stable than pure ascorbic acid), converted in situ into active ascorbic acid. 10 forms of HA + Polyglutamic Acid = the most complete hydration complex in the catalog. PGA retains 5,000× its weight in water (vs 1,000× for HA). It also acts as a film-former and amplifies the moisture retention of other agents. Cyanocobalamin (Vitamin B12): absent from the anua.com INCI but present on the physical packaging. This is what gives the serum its characteristic pink color. Store away from light to prevent B12 oxidation, which can cause the color to change. Pregnancy and breastfeeding: not recommended as a precaution. Three converging reasons — double arbutin (β + α) is a precursor to hydroquinone (Category C, safety not established in pregnancy), TXA has an insufficiently documented gestational profile when applied topically, and Betaine Salicylate belongs to the salicylate family. Azelaic acid (Serum A5) is the validated corrective alternative for this period.