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doi: 10.1016/j.tips.2018.03.004 10 NamkungJKimHParkS
Updated: March, 13 2026 In late 2023, the Food and Drug Administration (FDA) removed 19 peptides from their FDA Category 1 list to FDA Category 2
It made my skin smooth and soft to touch
Optimal dosing frequency: The peptides short plasma half-life (~0.5-2 hours) suggests frequent administration might sustain tissue concentrations more effectively than single daily dosing, but no formal dose-frequency comparison trials exist
Topical Glutathione combined with Vitamin C (like in this serum) is a safe and effective option for brightening and evening skin tone
