In 2021, we ran an independent clinical study in Brazil investigating whether a regimen consisting of Ascorbic Acid 20 Brightening C Serum (used once daily) and Minimalist Hydrating Cream (used twice daily), could improve the visible signs of photoaging, including wrinkling, uneven skin tone, and firmness. The study included 29 women, ranging from light to dark skin types, ages 47 through 59. Participants were also given a generic cleanser and sunscreen as adjunct products.
What and how we measured
Clinical evaluations of visible signs of aging were performed prior to the study and at days 14, 30, 60 and 90. The appearance of wrinkling, firmness and skin tone evenness/brightness were all measured both by dermatologists' visual/tactile assessments and by instrumentation (Chromameter, Cutometer and Visia® CR).
At day 30, there was statistically significant improvement in the appearance of wrinkling (p=.001), firmness (p<.001) and skin tone evenness (p=.003) as measured by dermatologists’ visual assessment. These improvements continued to be statistically significant at subsequent checkpoints at day 60 and day 90 of the study.
At day 30, there was statistically significant improvement in the appearance of wrinkling (p<.001), skin brightness (p=.025), and firmness (p=.001) as measured by instrumentation (Visia CR, Chromameter, and Cutometer respectively). These improvements continued to be statistically significant at subsequent checkpoints at day 60 and day 90 of the study.