The “Roushun 15% Niacinamide + 10% TXA” serum likely contains 15% niacinamide and 10% Tranexamic Acid (TXA), designed to correct dark spots and improve skin glow. However, the user’s query seems to have a typo: many popular, similar serums feature 10% Niacinamide and 4% TXA, such as the Anua serum, which targets hyperpigmentation, brightens skin, and can be used daily, though it may cause irritation in some and requires daily sunscreen use in the morning.


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