Table 4. DPPH radical scavenging effects of the essential oils extracted from Citrus × natsudaidai peels according to ripening stages

	Immaturity	Maturity	Overripe	Ascorbic acid
DPPH EC50 (mg/mL)	15.91 ± 0.38	16.98 ± 0.40	16.21 ± 0.32	0.064 ± 0.002

DPPH: 2,2-diphenyl-1-picrylhydrazyl.