According to the company, the trials reveal that a lotion formulated with the ingredient helped to provide a visible reduction in skin dryness, roughness and desquamation or flaking.
Purasal has been developed to tackle extremely dry skin, a condition that is often exacerbated by extreme environmental conditions, such as very cold weather conditions or an extremely dry climate.
Purasal is derived from L-Lactic acid
The ingredient is a concentrated solution of the ammonium salt of natural L-Lactic acid, which is produced by fermentation from biobased carbohydrates.
The company claims that it works by normalizing the keratinisation process, restoring the stratum corneum to a healthy condition and an optimised level of moisturization.
The clinical trial was designed to test the formulation on extremely dry skin conditions, and was applied to a group of women with this particular skin condition, during the winter period.
Five-week trials included 'regression' period
To ensure that there were no external influence on the outcome of the trials, the women were treated with the formulation for a period of three weeks, followed by a 2-week ‘regression’ period, when no product was applied to the skin.
“The results of the hydration measurement showed that the lotion with Purasal NH/COS gave significant superior moisturisation compared to the placebo group during the three weeks of treatment as well as during the regression period, demonstrating Purasal restoring skin to a healthy condition, whereas the placebo lotion merely was masking the symptoms of dry skin,” Dr. Sylvia Nefkens, senior technical marketing specialist for Purac’s personal care division.
“The appearance of the skin treated with Purasal visibly improved, flakes and ashiness were reduced and the skin looked smooth, healthy and radiant”.