Mitigation of retinol‐induced skin irritation by physiologic lipids: Evidence from patch testing

Author:

Fang Ye1,Ying Ye1,Xiaolan Wei1,Lin Sun1,Chenlan Xu1,Caixia Wang1,Dingqiao Lin1,Yanan Li1ORCID

Affiliation:

1. Research & Innovation Center Proya Cosmetics Co., Ltd. Hangzhou China

Abstract

AbstractBackgroundThere is a dearth of effective treatments to counter retinol‐induced skin irritation.ObjectiveThis study aimed to investigate the efficacy of three potential mitigants: (i) phytosteryl/octyldodecyl lauroyl glutamate (PLG), (ii) a physiologic lipid mixture (PLM) comprised of ceramide three and cholesterol, and (iii) niacinamide, in ameliorating irritation instigated by retinol.MethodsAn occlusive human patch test, spanning 5 days, was undertaken on 18 Chinese participants aged between 23 and 40. It was designed as a randomized, double‐blind, and vehicle‐controlled study. Clinician erythema assessment (CEA) and instrumental evaluations were employed pre and post‐test. Subsequently, a 4‐week consumer in‐use test, randomized and double‐blind in nature, was executed to substantiate the soothing effects of PLG.ResultsData from CEA and bioengineering assessments revealed that, in comparison to the vehicle control, both 2% PLG and 5% PLM notably curbed retinol‐induced skin erythema and inflammation. Notably, PLG outperformed PLM. Conversely, 3% niacinamide did not offer relief against retinol‐induced discomfort. The subsequent consumer in‐use test affirmed that treatments with 2% PLG were better tolerated than those with the vehicle alone.ConclusionTo the best of our knowledge, this study represents the first confirmation that physiologic lipids effectively mitigate retinol‐induced irritation. Given their capacity to counter retinol‐induced irritation, physiologic lipids, particularly PLG, are recommended for incorporation in retinol regimens. Additionally, the Visia‐CR a* value can serve as a robust objective measure for interpreting patch test outcomes.

Publisher

Wiley

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