Following an overnight fast , 13 healthy individuals ( Gender : 5M :8 F , with mean SD , age : 28.9 9.2 years , BMI : 26.3 2.7 kg/m ( 2 ) and fasting plasma glucose : 4.21 0.04 mmol/L ) randomly received 3g of each of the following 10 different ginseng treatments on separate visits : whole root KRG and AG ; 30 % , 50 % or 70 % ethanol extracts of KRG and AG and 2 cornstarch placebos .