Korean (also known as Asian) and American ginseng feature slight differences in their working on the body, but come from the same family and possess similar chemical makeup. Their main difference is that Korean Panax is a more warming Yang stimulant, while the American version is a more Yin, calming and cooling tonic. Both have energising attributes in unique ways. The American version is the calming or cooling version of the two. Asian ginseng has heating properties and is generally not recommended for relieving stress.
Ginenosides are the main active compounds in ginseng. Korean ginseng possesses ginenosides Rb1 and Rg1 whereas American ginseng has very slight amounts of Rg1. While ginenoside Rb1 has calming effects upon the central nervous system, Rg1 is known to stimulate energy naturally and thus improve cognitive performance. The Rb1 ginenoside does not however occasion a sense of fatigue, rather energising your body in restorative fashion. This incidence makes both the Korean and American versions effective rejuvenators.