Table 1.

Antioxidant activity of Uncaria gambir extracts

Samples	IC50 (µg/mL)
	SOD	DPPH
Methanol	7.1±1.78	11.8±0.26a
n-hexane	26.8±3.48	23.7±0.55
Ethyl acetate	6.2±0.47	11.2±0.70
Water	38±8.38	16.3±0.33
Quercetin (+)	5.26±0.27	3.8±0.31

^aThe DPPH measurements were tested in duplicate, while the SOD values were measured in pentuiplicate and were statistically expressed as mean ± standard deviation. SD: Standard deviation, SOD: Superoxide dismutase, DPPH: Diphenylpicrylhidrazyl