This award-winning serum captures the most gentle and effective form retinol on Earth (retinal) - - estimated by dermatologists to be 20x more effective than regular retinol. This elusive ingredient is captured using Protocol's patented oxygen-free bottling technology, designed by the Protocol Lab Team in collaboration with aerospace engineers.

Most clients see improvements within 10 days.

Formulation and active ingredient found to be more effective at reversing wrinkles and dark spots than a $5,000 glycolic acid chemical peel applied in a clinical setting. C. Rouvrais. Journal of Cosmetic Dermatology 2018 Dec;17(6):1136-1143

Key Active:

0.1% retinal, the enzyme-calibrated form of retinol. (i.e., naturally-occuring retinaldehyde)