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8 peer-reviewed studies
What the evidence says
Most American Ginseng studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality meta-analyses and randomised trials published 2011–2018.
Based on 8 studies · 2 meta-analyses · 3 RCTs
Confidence
HighBy outcome
Newest study from 2018 · Latest meta-analysis: 2017
A systematic review found American ginseng may help prevent and shorten respiratory infections (colds).
Mousa HA et al. · Journal of evidence-based complementary & alternative medicine (2017)
A meta-analysis found ginseng modestly lowered blood pressure.
Lee HW et al. · Current vascular pharmacology (2017)
A review of complementary approaches for cold prevention/treatment included North American ginseng.
Nahas R et al. · Canadian family physician Medecin de famille canadien (2011)
A systematic review found ginseng may reduce fatigue.
Arring NM et al. · Journal of alternative and complementary medicine (New York, N.Y.) (2018)
A randomized trial found American ginseng improved glycemic control.
Mucalo I et al. · Collegium antropologicum (2012)
A meta-analysis assessed ginseng for menopausal women's health.
Lee HW et al. · Medicine (2016)
A randomized trial of a konjac fibre blend with American ginseng assessed glycemic and cardiometabolic outcomes.
Jenkins AL et al. · European journal of nutrition (2018)
A randomized trial found American (red) ginseng had hypoglycemic effects.
Yoo KM et al. · Journal of food science (2012)