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.
2,493 licensed natural health products in Health Canada's LNHPD list Panax Ginseng as a medicinal ingredient.
That makes Panax Ginseng a recognized, licensable medicinal ingredient in Canada — regulated by Health Canada's Natural and Non-prescription Health Products Directorate, which issues each licensed natural health product a Natural Product Number (NPN). Search the LNHPD to verify.
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
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.
Revision history
Every change to this ingredient's evidence status, dated and explained. The full cross-library log lives at Evidence Updates.
- 2026-07-07Grade changeGrade B → Grade C
Downgraded from B to C. Acute cognitive effects appear in some trials but replicate inconsistently across doses and extracts, so the evidence is limited rather than moderate.
See how Panax Ginseng compares on grade, dose, and goal in the Evidence Explorer.
