Uji Aktivitas Antioksidan Ekstrak Metanol Biji Markisa Ungu (Passiflora edulis var. edulis) Dengan Metode DPPH (2,2 diphenyl-1-picrylhydrazyl)
High exposure to free radicals on the skin can cause damage to skin cells or tissues. Damage to cells or tissues in the skin will result in the skin being susceptible to diseases such as autoimmunity, skin cancer, and premature aging. Antioxidants function to protect the body from free radicals, both internally and externally. The part of the body that is often exposed to free radicals externally is the skin, such as ultraviolet radiation and cigarette smoke. One of the plants that has the potential for antioxidant compounds is the seeds of passion fruit. Purple passion fruit seed extract contains flavonoids, tannins, saponins and triterpenoids which are secondary metabolites. The research method included sample preparation,determination, simplicia manufacture, sample extraction using methanol solvent, thickening process by maceration process, phytochemical screening, and testing of antioxidant activity using the DPPH (2,2diphenyl-1-picrylhydrazyl) method by UV-Vis spectrophotometry.