FORMULATION OF EXTRACT MOISTURIZING CREAM WATERMELON (Citrullus lanatus (Thunb.) Matsum. & Nakai) AS ANTIOXIDANT

Abstrak

Dry skin is one of the most common problems, where dry skin looks dull and rough. Therefore, it is necessary to prepare a moisturizing cream that can be obtained from watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai) which has antioxidant activity in the form of flavonoids. This studi aims to formulate the watermelon extract (Citrullus lanatus (Thunb.) Matsum. & Nakai) into fresh cream preparations of watermelon extract (Citrullus lanatus (Thunb.) Matsum. & Nakai) as antioxidants with varying concentrations of F1 (base), F2 (5%), and F4 (15%). This type of research is experimental with a post test design with control with group design. The sample is Watermelon purchased at the Jepara Mayong Market. This research process uses water extract, namely fresh fruit juice thickened with a water bath thermostat at a temperature of 80⁰C. Determination of antioxidant activity was carried out using UV-Vis spectrophotometry using the DPPH (1,1-diphenyl-2-picrylhidrazil) method using quercetin as a comparison solution. Phytochemical screening of watermelon extract (Citrullus lanatus (Thunb.) Matsum. & Nakai) was positive for flavonoids, saponons and sucrose. The content of watermelon extract used for the antioxidant activity test was flavonoids. Watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai) fruit extract has moderate antioxidant activity with an IC50 of 143,93 µg/ml. formulated into a moisturizing cream has weak antioxidant activity IC50 at F1, F2, F3, and F4 respectively 552,09 µg/ml, 451,50 µg/ml and 387,26 µg/ml. The study shows that watermelon extract (Citrullus lanatus (Thunb.) Matsum. & Nakai) has moderate antioxidant activity and can be formulated into a moisturizing cream for watermelon extrac