Academic journal article Research Quarterly for Exercise and Sport

Effects of Chronic Ginseng Supplementation on Affect and Mood: Results of a Double-Blind, Placebo-Controlled, Randomized Clinical Trial

Academic journal article Research Quarterly for Exercise and Sport

Effects of Chronic Ginseng Supplementation on Affect and Mood: Results of a Double-Blind, Placebo-Controlled, Randomized Clinical Trial

Article excerpt

Bradley J. Cardinal, Oregon State University, and Hermann-J Engels, Wayne State University

Ginseng is a popular, commercially available dietary supplement that is purported to have a number of psychological benefits. The purpose of this study was to examine these claims with specific reference to ginseng's effects on affect and mood. Eighty-three participants were recruited for this study (40 women, 43 men), with a mean age of 25.7 years (SD= 5.0). Upon entering the study, participants were randomly assigned to one of three experimental conditions: placebo (n = 34), 200 mg ginseng (n = 22), or 400 mg ginseng (n = 27). The ginseng preparation used in this study consisted of the Panax ginseng C.A. Meyer concentrate G115 in capsular format with concentrations of ginsenosides verified independently by standard gas chromatographic-mass spectrometric analytic procedures. The placebo preparation consisted of lactose (Baxter Scientific, Chicago) and was provided to study participants in the same gelatin capsules (CAPSUGEL, Greenwood, SC) that were used for the ginseng. Each participant was given a 60-day a llotment of their respective supplement along with written instructions regarding the proper intake and storage of the capsules over the 8-week study period. Participants were not informed about the specific ginseng type or preparation used in this study, nor that two different treatment levels were involved. …

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