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The antioxidant activities of Salak plum (Salacca edulis) peel extracts were assessed by 1, 1-diphenyl-2-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothaiazoline)-6-sulfonic acid (ABTS), and ferric reducing ability of plasma (FRAP) assays. The ethyl acetate (EtOAc) fraction was the most potent (DPPHIC50=2.932 ± 0.030 µg/mL, ABTSIC50=7.933 ± 0.049 µg/mL, FRAPEC=7,844.44 ± 40.734). Chlorogenic acid was detected as the marker (1.400 ± 0.102 g/kg). The EtOAc fraction was non-cytotoxic in vero and normal human fibroblast (NHF) cells. It exhibited cellular oxidative prevention and damage treatment at 5-40 µg/mL in NHF cells. Salak plum peel loaded liposome consisting of lecithin and hydrophobically modified hydroxyethylcellulose (HMHEC) was developed and found stable with adequate entrapment efficacy. Thus Salak plum peel was highlighted as a potential ecological antioxidant for health promotion aspects, and for cosmetics.

Salak Plum Peel Extract as a Safe and Efficient Antioxidant Appraisal for Cosmetics