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Description
Cells were used between passages 30 and 60

[DARK SPOTS SERUM] Daily serum enriched with glutathione and vitamin C, and antioxidants, to gently yet effectively fade dark spots and hyperpigmentation, leaving you with glowing, clear skin

This represents a recognized research gap and an opportunity for future investigation

Because melanin-producing cells (melanocytes) are more active in brown skin, these dark marks often last longer or appear more noticeable
