Purito Seoul — TXA 6% Niacinamide 10% Retinal Serum 30ml

Purito's TXA 6% Niacinamide 10% Retinal serum is a tri-active formula with an interesting architecture that requires several clarifications. The 6% tranexamic acid falls between the two Cos De Baha references (TN at 5% and TT at 10%)—a significant concentration for upstream pigment inhibition. The 10% niacinamide is within the clinically documented range for blocking melanosome transfer and strengthening the barrier. These two active ingredients alone constitute a solid and well-dosed depigmenting formula. Retinal (retinaldehyde) is a direct retinoid—it represents an intermediate conversion step to retinoic acid, which is more active molar for molar than retinol. However, at 25 ppm (0.0025%), the concentration is very low compared to clinical studies on retinal, which use 0.05 to 0.1% (500 to 1,000 ppm). Encapsulation in the bi-phase system may improve local bioavailability, but the retinoid effect at this dose remains difficult to quantify precisely—the main benefit of the serum relies on the TXA + Niacinamide duo; the retinal provides a complementary contribution that should not be overestimated in recommendations. Regulatory point: retinal is not covered by EU restriction 2024/996, which specifically targets Retinol, Retinyl Acetate, and Retinyl Palmitate—this product is therefore EU compliant. However, the absolute contraindication for pregnancy applies to all retinoids without exception, regardless of cosmetic regulations and concentration. Cyanocobalamin (vitamin B12) provides the characteristic pink color and offers an antioxidant effect—it may fade in light (a normal phenomenon documented by the brand). Lactococcus Ferment Lysate and fructo-oligosaccharides provide relevant microbiome support for skin treated with depigmenting active ingredients. Ceramide NP protects the barrier. Green preservation system (Phenylpropanol + Levulinic Acid + Sodium Levulinate).