Abstract
Objective: The aim of this study was to obtain a peel off gel facial mask preparation from Arabica coffee fruit peel extract that meets the requirements and to determine the antioxidant activity of Arabica coffee fruit peel extract and peel off gel facial mask preparation from coffee fruit peel extract
 Methods: In this study, three formulations of peel off gel facial mask were made with 3 variations in the concentration of coffee fruit peel extract, namely F1 (1%), F2 (2%), and F3 (3%). Furthermore, the preparation was evaluated for 28 d of storage at room temperature (25-30 °C) and cold temperature (8 °C) which included organoleptic, pH, spreading ability, homogeneity, viscosity, dry time, and antioxidant activity.
 Results: The results of the evaluation showed that F1, F2, and F3 met the requirements which included organoleptic, pH, spreading ability, homogeneity, viscosity, and dry time. The antioxidant activity of the coffee fruit peel extract was very strong (IC50 17.36 µg/ml). The antioxidant activity in the peel off gel facial mask sample of formula F1 (IC50 75.63 µg/ml) and formula F2 (IC50 50.71 µg/ml) was strong, and for formula F3 was very strong (IC50 21.44 µg/ml).
 Conclusion: All formulas met the evaluation requirements, arabica coffee fruit peel extract and peel of gel facial mask preparation (F3) have very strong antioxidant activity.
Highlights
The skin is the body's defense system that protects internal organs from sun exposure
The process of preventing premature aging can be done by using cosmetics made from natural ingredients that function as antioxidants
During 28 d of storage at room temperature and cold temperature, the three formulas did not change in form, color and odor
Summary
The skin is the body's defense system that protects internal organs from sun exposure. Excessive exposure to UV rays will trigger the formation of free radicals which can be characterized by symptoms of the skin damage process such as the appearance of wrinkles, dryness, scales, and cracks. Antioxidants are compounds that can neutralize and reduce free radicals and inhibit oxidation in cells, thereby reducing cell damage, such as premature aging [3]. The process of preventing premature aging can be done by using cosmetics made from natural ingredients that function as antioxidants. Some of the waste of natural ingredients can provide benefits for health, especially the skin. One of the waste natural ingredients that can be used as an active ingredient in cosmetics is the skin waste of Arabica coffee (Coffea arabica L.). Of the several types of mask products circulating in the community, the most practical mask products to use are peel off gel masks or masks that after drying can be peeled off immediately [6]
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