In an acute , randomized , placebo-controlled , double-blind , crossover design , @ healthy participants ( @M :@ F , age :@ y , BMI : @ kg@kg/m ( @ ) , systolicBP/diastolicBP : @/@mmHg ) on four occasions were administered : KRG root ( @g ) , KRG ginsenosides extract , KRG polysaccharides extract , and cornstarch control .