Some By Mi Yuja Niacin 30 Days Blemish Care Serum Mask is a brightening sheet mask enriched with Korean Yuja extract and niacinamide to target dark spots, dullness and uneven tone, helping reveal a clearer and more luminous complexion. Infused with glutathione and arbutin, the formula supports a more even skin tone by reducing the appearance of pigmentation and blemish marks, while antioxidants protect the skin from environmental stress that can accelerate discoloration. The lightweight essence deeply hydrates and revitalizes tired-looking skin, improving texture and restoring radiance with continued use. The mask adheres seamlessly to the skin to lock in nourishment, leaving the complexion looking fresh, bright, hydrated and noticeably more radiant after each use.