✓ No active regulatory warningsFDA MedWatch, EMA EudraVigilance, WHO VigiBase, WADA Prohibited List · 2026-05-29
📰Read the full Ginseng (American) evidence review on GMJ News →Complete clinical article, references and updates on news.gmj.ge. This page is the structured safety summary.⚠ Patient on warfarin adding American ginseng — REDUCES INR (opposite direction); monitor [1]
⚠ Patient on insulin adding American ginseng — 18–28% postprandial glucose drop [2]
⚠ Patient buying 'ginseng' without specifying species — confirm American vs Asian [1]
⚠ Wild-harvested American ginseng — CITES concern; recommend cultivated [1]
🥗 Food first — build your daily Typical 200–400 mg
Check the foods you regularly eat — the bar fills toward your daily target.
American ginseng tea (1 cup, 3 g root)30 mg total ginsenosides (approximate)
Ginseng chicken soup (traditional)15 mg total ginsenosides (approximate)
Check your regular foods above
🔬 Lab interpreter
Recommended test
FBG / postprandial glucose
FBG / postprandial glucose
Reference range / target
Per diabetes goals
Per diabetes goals
Significant glucose-lowering effect [2].
Full lab monitoring ↓⚕ For professionals — confirm ranges against your local laboratory.
Clinical verdict
American ginseng has the strongest ginseng evidence for glucose management (18–28% postprandial reduction). The critical differentiators: (1) American ≠ Asian ginseng — different species, different profiles; (2) warfarin interaction REDUCES INR (opposite to what's expected); (3) COLD-fX (polysaccharide extract) ≠ ginsenoside extract — different products for different indications; (4) CITES-listed — choose cultivated [1] [2].
1 How much do I need?
👤 Adults: Specific dosage data under clinical review
👴 Elderly: Specific dosage data under clinical review
🤰 Pregnancy: See guidance
Avoid. Ginsenosides have hormonal activity. Insufficient safety data [1].
👦 Pediatric: See guidance
CVT-E002 was studied in elderly adults; no pediatric data. American ginseng tea given to children traditionally but no formal studies [1].
🏃 Athletes: Standard dose
⚖️ Obesity: Standard dose
Fat-soluble compounds may require dose adjustment in obesity.
🩺 Renal: Consult specialist
Dose adjustment may be needed in renal impairment.
🌱 Vegan: Standard dose
How to take
💊 With food: Before meals for glucose effect [2].
🚫 Avoid: Combining with warfarin without INR monitoring. Wild-harvested roots (CITES). Confusing with Asian ginseng [1].
2 Which form?
| Form | Bioavailability | Vegan | Cost |
|---|---|---|---|
| ['American ginseng root extract (standardized)', 'preferred', 'Standardized to ginsenoside content (4–7%). 200–400 mg BID [1].'] | Standard | Check label | |
| ['CVT-E002 / COLD-fX® (polysaccharide extract)', 'clinical', 'Specific poly-furanosyl-pyranosyl-saccharide fraction. 200 mg BID for URI prevention. Separate product from ginsenoside-standardized extracts [1].'] | Standard | Check label | |
| ['Dried American ginseng root slices', 'traditional', 'Used in teas and soups. 1–3 g/day steeped or simmered [1].'] | Standard | Check label | |
| ['American ginseng powder (capsules)', 'common', '200–500 mg BID. Variable ginsenoside content if not standardized [1].'] | Standard | Check label |
3 Common questions
American ginseng vs Asian ginseng — what's the difference? ▼
Different species with different ginsenoside ratios. American (P. quinquefolius): higher Rb1 (calming), better glucose evidence, 'cooler' in TCM. Asian (P. ginseng): higher Rg1 (stimulating), better cognitive/erectile evidence, 'warmer' in TCM. They are not interchangeable [1].
Why is American ginseng endangered? ▼
Overharvesting of wild American ginseng (particularly in Appalachian forests) has led to CITES Appendix II listing. Wild roots are prized in Asian markets for their distinctive shape and command extremely high prices. Choose cultivated American ginseng to support sustainability [1].
Can American ginseng lower my blood sugar too much? ▼
If you're on antidiabetic medications, yes. American ginseng reduces postprandial glucose by 18–28% in RCTs. Combined with insulin or sulfonylureas, this could cause hypoglycemia. Monitor blood glucose and consult your physician [2].
Is COLD-fX the same as regular American ginseng? ▼
No. COLD-fX (CVT-E002) is a specific polysaccharide fraction extracted from American ginseng — it does NOT contain the traditional ginsenosides. Its evidence is for URI prevention through immunomodulation, not the glucose-lowering effects of whole-root ginsenoside extracts. They are different products [1].
4 Clinical evidence
Strong
Postprandial glucose: a systematic review of RCTs (primarily from Vuksan group, University of Toronto) found 3 g ground American ginseng root taken 40 min before a glucose load significantly reduced postprandial glucose by 18–28% in both diabetic and non-diabetic subjects [2]. HIGH
Moderate
URI prevention: 2 RCTs of CVT-E002 (COLD-fX®, 200 mg BID) in elderly/institutionalized adults showed reduced incidence of laboratory-confirmed respiratory illness over 4 months [1]. Cognitive: 1 crossover RCT found improved working memory and calmness (vs Asian ginseng which improved speed but worsened calm) [1]. Cancer-related fatigue: 1 RCT (n=364) found American ginseng 2,000 mg/day reduced cancer-related fatigue vs placebo at 8 weeks (Mayo Clinic study) [1]. MODERATE
Insufficient
5 Safety, toxicity & adverse events
Relative
⚠ Concurrent warfarin — may reduce its effect (important)
⚠ Diabetes — additive glucose lowering
⚠ Hormone-sensitive conditions — possible mild estrogenic activity
⚠ Stimulant/MAOI interaction; insomnia; discontinue before surgery
🚩 Red flags
● Patient on warfarin — American ginseng REDUCES INR [1]
● Diabetic patient on secretagogues — significant glucose-lowering interaction [2]
● Immunosuppressed patient using CVT-E002 — immunostimulatory [1]
6 Interactions
Drug interactions
Warfarin Major
Mechanism: American ginseng reduces warfarin effect (possibly CYP2C9 induction) [1].
Effect: Decreased INR — reduced anticoagulation [1].
Action: Monitor INR within 1 week of starting/stopping. May need warfarin dose increase [1].
Insulin / Sulfonylureas Moderate
Mechanism: 18–28% postprandial glucose reduction [2].
Effect: Hypoglycemia [2].
Action: Monitor glucose. Dose-adjust antidiabetics [2].
Supplement synergies
Chromium · 200 µg chromium + 200 mg American ginseng
Complementary glucose-lowering mechanisms [1].
Complementary glucose-lowering mechanisms [1].
Alpha-Lipoic Acid · 600 mg ALA + standard ginseng
Both improve glucose disposal through different mechanisms [1].
Both improve glucose disposal through different mechanisms [1].
7 Regulatory
United States: CITES Appendix II: export requires permit. Available as dietary supplement. No FDA-approved claims [1].
Canada: COLD-fX® is a licensed Natural Health Product (NPN) for URI prevention [1].
CITES: International trade regulated. Wild harvest requires sustainability certification [1].
8 Cite this page
Vancouver: Pkhakadze G. Ginseng (American) — safety profile [Internet]. Tbilisi: PHIG; 2026 [cited 2026 Oct 17]. Available from: https://supplement.ge/ingredients/ginseng-american/
APA 7th: Pkhakadze, G. (2026). Ginseng (American) — Safety profile. Public Health Institute of Georgia. https://supplement.ge/ingredients/ginseng-american/
📋 Editorial information
Author: Prof. G. Pkhakadze, MD, MPH, PhD
Institution: Public Health Institute of Georgia (PHIG)
Affiliation: David Tvildiani Medical University (DTMU)
First published: January 2026
Last reviewed: 2026-05-29
Next review: April 2027
References: 4 cited sources
COI: SupplementIndex receives no funding from supplement manufacturers. All content independently authored by PHIG.
Process: Systematic literature review
📄 License & reuse
Published under Creative Commons Attribution 4.0 International (CC BY 4.0). You may share and adapt for any purpose with attribution.
Pkhakadze G. "Ginseng (American) — Safety Profile." SupplementIndex, PHIG, 2026. https://supplement.ge/ingredients/ginseng-american/ CC BY 4.0.
GP
Prof. G. Pkhakadze, MD, MPH, PhD
Professor of Public Health · Head of Department, DTMU
Editor-in-Chief, Georgian Medical Journal (ISSN 3088-4322)
Chair, Public Health Institute of Georgia · UEMS Public Health Section
Educational and public health purposes. CC BY 4.0. Consult your healthcare provider before starting any supplement. Corrections: info@accreditation.ge. Publisher: PHIG