* The goal of this clinical trial is to evaluate the efficacy of the novel polyherbal lip hydrant on dryness, fine lines and color of the lips in 66Thai people aged between 18-40 years old. The inclusion criteria will include subjects with subjective complaint of dry lips.The main question it aims to answer is Does the novel polyherbal lip hydrant improve biophysical barrier of the lips? * Participant will be asked to apply the lip hydrant or the petroleum gel once a day before bedtime, and refrain from using other lip products throughout the clinical trial period (28 days). * Researchers will compare control group (Petroleum gel) with lip hydrant group to see whether biophysical barrier (wrinkles, colors, fine lines, roughness) improve or not.
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Objective evaluation
Timeframe: 30 minutes per 1 participant