Korean Ginseng Pharmacology and Clinical Uses by Jeffrey Dach MD In a 1979 report, Dr Hiai studied the effect of Korean Ginseng on the HPA axis.  After intraperitonesal injection in experimental mice, both serum ACTH and Cortsol increased.  The effect was suppressed by Dexamethasone.  Dr Hiai concluded that ginseng acts on the hypothalamus and/or hypophysis […]