Hottest and most yang of the ginsengs, which makes it best for people over 40 whose hormonal “fires” have begun to cool off. It is also most appropriate for very debilitated people. It is particularly inappropriate for younger (under 40), generally healthy people who are suffering from overheated conditions, often brought on by the daily use of stimulants (coffee, cola, etc.) and too much stress. Chinese researchers have also shown red ginseng to be superior in promoting good blood circulation, reducing abnormal clotting, and invigorating the elderly.