Panax Ginseng
Panax ginseng
Traditional energy and cognition adaptogen.
Evidence tier
Preliminary
Research weight
Citations
16 verified / 16
Classification
TCM Herb
❝
What the evidence says. Early or small human trials; promising but not yet conclusive.
What is Panax Ginseng?
Panax Ginseng (Panax ginseng) is a traditional Chinese medicine herb used for fatigue reduction. NutriDex grades the human evidence as Preliminary. Panax (Asian) ginseng contains ginsenosides with adaptogenic and immunomodulating activity. Small trials suggest reduced fatigue (including cancer-related fatigue), modest cognitive improvements, and possible immune benefits. Results are inconsistent and many trials are small or low-quality, so the overall evidence remains preliminary. American ginseng (P. quinquefolius) has separate cold-prevention data.
Purported Benefits
✓Fatigue reduction
✓Cognitive performance
✓Immune support
✓Possible glucose effects
Evidence by outcome
The same supplement can be well-proven for one use and unproven for another — here is the human evidence graded outcome by outcome.
| Outcome | Evidence | Effect | Studies |
|---|---|---|---|
| Fatigue (disease/cancer-related)Multiple meta-analyses show small but consistent SMD ~-0.21 to -0.33; one 2026 cancer subgroup found no benefit, so not uniform. | Moderate | ↑ benefit · small | 4 |
| Cognition / memory2024 MA found a small memory benefit (SMD 0.19) but no effect on overall cognition; Cochrane judged evidence limited. | Preliminary | ↔ mixed · small | 4 |
| Fasting glucose / glycemic controlMeta-analyses show a modest fasting-glucose drop (~-0.31 mmol/L); no consistent effect on HbA1c or HOMA-IR. | Moderate | ↑ benefit · small | 3 |
| Erectile / sexual functionCochrane 9-RCT review showed a small IIEF gain (3.5 pts) but rated certainty low. | Preliminary | ↑ benefit · small | 2 |
| Blood pressure17-RCT meta-analysis found no significant effect on systolic, diastolic, or mean arterial pressure. | Moderate | — no effect · negligible | 1 |
Dosing & Compounds
Typical Dose
200–400 mg/day standardized extract.
Active Compounds
Safety & Cautions
Generally safe short-term. Insomnia, headache. Many drug interactions; avoid with anticoagulants and in pregnancy. Educational only — always check with your doctor or pharmacist before combining Panax Ginseng with any medicine.
Panax Ginseng drug interactions
Known or theoretical interactions between Panax Ginseng and common medications — educational, not exhaustive. Always check with your doctor or pharmacist before combining Panax Ginseng with any medicine.
Caution
Warfarin
Panax ginseng may reduce warfarin's effect (lower INR), potentially raising clot risk.
Ginseng appears to reduce warfarin's anticoagulant response, possibly via altered metabolism. NIH NCCIH — Asian Ginseng
Monitor
Insulin & oral antidiabetics
Panax ginseng may lower blood glucose, adding to diabetes medications.
Ginsenosides may improve insulin secretion/sensitivity and glucose uptake. NCCIH — Asian Ginseng
Key Studies ★ 16 studies
Meta-analysis
Diseases (Phytotherapy SR) 2026
✓ Full text
In this 2026 systematic review/meta-analysis of phytotherapy for cancer-related fatigue, the Panax ginseng subgroup (4 trials, incl. Guglielmo 2024) showed no significant benefit vs placebo (SMD = 0.22; 95% CI -0.11 to 0.53; I2 = 12.1%).
Meta-analysis
Zeng 2024 (Phytotherapy Research)
✓ PubMed
Systematic review/meta-analysis of 15 RCTs (671 participants). Ginseng significantly improved memory (SMD 0.19, 95% CI 0.02-0.36; p<0.05), with a larger effect at high doses (SMD 0.33, 95% CI 0.04-0.61). No significant benefit on overall cognition, attention, or executive function.
Meta-analysis
Medicine (Baltimore) 2022
✓ Full text
Meta-analysis of 12 RCTs (n=1,298) found ginseng supplements significantly reduced disease-related fatigue (SMD = 0.33; 95% CI 0.22-0.44), with effects described as time- and dose-dependent.
meta-analysis
Komishon 2016
✓ PubMed
Systematic review and meta-analysis of 17 RCTs (1,381 participants) found ginseng had no significant effect on systolic or diastolic blood pressure or mean arterial pressure, indicating a neutral vascular effect.
systematic review
Lee 2016
✓ PubMed
Systematic review of 10 double-blind placebo-controlled RCTs found positive evidence for ginseng/Korean red ginseng on sexual function and arousal in menopausal women, but no significant effect on hot flash frequency, hormones, or endometrial thickness (low-certainty evidence).
Cochrane review
Geng 2010 (Cochrane)
✓ Full text
Limited evidence for cognitive enhancement.
systematic review
Seida 2011
✓ PubMed
Systematic review of 5 RCTs (747 participants) of North American/Asian ginseng for the common cold found only a non-significant trend toward lower incidence (RR 0.70, 95% CI 0.48-1.02) but a significant shortening of cold/respiratory illness duration by about 6.2 days; evidence judged insufficient.
Meta-analysis
Shishtar 2014 (PLoS One)
✓ PubMed
Meta-analysis of 16 RCTs (>=30 days). Ginseng modestly but significantly lowered fasting blood glucose vs control (MD -0.31 mmol/L, 95% CI -0.59 to -0.03; p=0.03) in people with and without diabetes; no significant overall effect on fasting insulin, HbA1c, or HOMA-IR.
systematic_review
Lee 2022 (Cochrane)
✓ PubMed
Cochrane review of 9 RCTs found ginseng produced only a trivial improvement in erectile function vs placebo (IIEF mean difference 3.52 points, 95% CI 1.79-5.25; low-certainty evidence), though men reported greater ability to have intercourse (RR 2.55).
meta_analysis
Luo 2023
✓ PubMed
Meta-analysis of 7 RCTs in cancer patients found ginseng significantly reduced cancer-related fatigue (SMD -0.21) and improved physical (SMD 0.25) and emotional (SMD 0.20) well-being.
meta_analysis
Naseri 2022
✓ PubMed
Meta-analysis of 20 RCTs in prediabetes/type 2 diabetes found ginseng supplementation significantly reduced fasting plasma glucose, total cholesterol, IL-6, and HOMA-IR (insulin resistance).
meta_analysis
Disease-related fatigue meta-analysis 2022
✓ PubMed
Meta-analysis of 12 RCTs (1,298 participants) found ginseng supplements significantly reduced disease-related fatigue (SMD -0.33, 95% CI -0.44 to -0.22).
experimental study
Dong 2017
✓ Source
Mechanistic study reported solid evidence of a ginseng-warfarin interaction, with ginsenosides producing dose- and time-dependent antagonism of warfarin's anticoagulation in rats via induction of hepatic CYP2C9/3A4 and restoration of clotting factors, flagging a safety hazard for warfarin users.
Study
Barton 2013
✓ PubMed
American ginseng reduced cancer-related fatigue.
Study
Reay 2005
✓ PubMed
Improved cognitive performance and blunted glucose response.
authoritative body
NCCIH Asian Ginseng
✓ Source
NIH NCCIH states overall evidence for Asian ginseng's health benefits (cognition, diabetes, fatigue) is inconclusive, that most research shows no improvement in athletic performance, and that short-term oral use up to 6 months appears safe, with insomnia as the most common side effect and rare reports of liver damage.