Full profile
| Also known as | Asian ginseng, Korean ginseng, Panax ginseng C.A. Meyer |
|---|---|
| Best for | Adaptogenic energy and stress resistance (limited evidence) · Occasional mental fatigue on long sessions (mixed evidence) |
| Evidence grade | Grade C — Limited — early or small human trials |
| Studied dose range | 200–400 mg daily of extract standardized to 4–7% total ginsenosides (Health Canada permits 200–600 mg/day). |
| Time to effect | Some acute effect within hours; adaptogenic benefit conventionally built over 4–12 weeks. |
| Best form | Root extract standardized to a stated total ginsenoside %. G115 (Ginsana) is the most-studied branded material. |
Evidence, honestly graded
Claim-specific grading: for cognition, the largest independent review (Geng 2010, Cochrane, PMID 21154383) found no convincing evidence of a cognitive-enhancing effect in healthy people — grade C. Single-dose trials of the G115 extract (Reay 2005/2006) did reduce subjective mental fatigue and improve mental-arithmetic performance, but that mental-fatigue signal is graded B only for American ginseng (Panax quinquefolius) fatigue endpoints — a different species — not for this Asian Panax ginseng cognition claim. Do not read the American-ginseng fatigue grade across to this entry.
See the full grading rubric — study type, replication, population match, and dose adequacy — in The Evidence Standard.
Side effects
- Generally well tolerated
- Possible overstimulation or insomnia — take earlier in the day
- Headache or GI upset
- Elevated blood pressure with prolonged high doses
Who should avoid it or check first
- Pregnant or breastfeeding without clinician guidance
- On anticoagulants without review
- Poorly controlled diabetes or hypertension without review
- Before surgery
Interactions
- May interact with warfarin, diabetes medication, blood-pressure medication, and stimulants — discuss with a clinician
Stacks well with
- L-Theanine
- Citicoline
- Phosphatidylserine
Use caution stacking with
- Rhodiola Rosea at full dose (two stimulating adaptogens — risks overstimulation)
What to look for on a label
- Specify species and standardization (e.g. "Panax ginseng root extract, 4% ginsenosides") — never just "ginseng".
- Given a mild stimulating potential, morning dosing suits a stimulant-free positioning.
References
- Reay 2005 & 2006, J Psychopharmacology — acute G115 trials. Single-dose Panax ginseng improved performance and reduced mental fatigue during demanding tasks in healthy adults. PMID 15982990; PMID 16401645. Educational, not a product claim.
- Geng 2010, Cochrane Database Syst Rev — ginseng for cognition. No convincing evidence of cognitive enhancement in healthy people. PMID 21154383; doi:10.1002/14651858.CD007769.pub2. Primary basis for the C grade on cognition.
Grades and studied doses are our conservative reading of the human research, shown for education. They are not product claims, and a studied dose is not a recommended dose.
See how Panax Ginseng compares on grade, dose, and goal in the Evidence Explorer.
