Ingredient or product comparison

Tirtir Niacinamide 20% Serum Versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide

This brightening serum is formulated around Niacinamide and Alpha-Arbutin to fade the look of dark spots and refine the look of pores. This anti-aging serum is formulated around Niacinamide and Ceramide NP to soften the look of wrinkles and refine skin texture

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