Formulations with green clay for acne-prone skin: evaluation of rheology and sensory

Formulations with green clay for acne-prone skin: evaluation of rheology and  sensory

Research Summary

Acne is an inflammatory skin condition that develops in pilosebaceous follicles, primarily affecting individuals during the onset of puberty. Among the numerous chemicals with dermatological and cosmetic purposes, raw materials of mineral origin have often been sought in formulations aimed at treating and preventing acne. This study aimed to develop cosmetic preparations including green clay and to conduct sensory analysis of these formulations.

Four formulations containing 2.5% to 5% green clay, in the presence or absence of dimethicone, were prepared. The rheological behavior of the samples was analyzed at various time intervals—0, 24 hours, 30 days, 60 days, and 90 days—using a cone and plate-type rheometer (DVII + viscometer, Brookfield). Sensory analyses of the formulations were also conducted to evaluate the user experience.

It was concluded that all formulations exhibited pseudoplastic behavior. Statistical analysis showed no significant differences in user acceptance between formulations with or without dimethicone in attributes such as spreadability, stickiness, color, and sensation after application. However, in the attribute of odor, there was greater acceptance of formulations that included dimethicone.

Keywords: Cosmetics, Green clay, Sensory Analysis, Evaluation.

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