retinoids
Obagi Medical Retinol 1.0
Obagi Medical Retinol 1.0 is a benchmark for medical-grade OTC retinoids, featuring a high 1% concentration and a sophisticated 'entrapped' delivery system that ensures stability and a slow release to minimize irritation. The packaging is an opaque tube with a precision nozzle, effectively protecting the photosensitive formula from degradation. While it lacks batch-level COAs, its status as a clinically-trusted professional brand and the use of the maximum effective OTC retinol percentage justifies its gold-tier placement.
Sources & References
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