In an acute , randomized , placebo-controlled , double-blind , crossover design , 16 healthy participants ( 9M :7 F , age :309 y , BMI : 24 kg3kg/m ( 2 ) , systolicBP/diastolicBP : 10911/668mmHg ) on four occasions were administered : KRG root ( 3g ) , KRG ginsenosides extract , KRG polysaccharides extract , and cornstarch control .