Ren Shen
StarPanax ginseng C.A.Mey.
Synonyms: Ginseng, Asian Ginseng, Panax
Also known as: Ninjin人参 ニンジン · Kampo; Insam人蔘 인삼 · Korean; Nhân sâm · Vietnamese; Jên Shên · Wade–Giles
Easily confused with
- Dang Shen 党参 — Ren Shen / Dang Shen differ by one syllable. Practitioner-reviewed; no published source. Ren Shen: tonifying, warm, toxicity none_known; Dang Shen: tonifying, neutral.
Safety at a glance
- High risk · Do not combine with Li Lu or Wu Ling Zhi (十八反 / 十九畏)
- Caution · With phenelzine, maoi, monoamine oxidase inhibitor: mechanism unknown; case reports of manic symptoms, and of insomnia, headache and tremor, with phenelzine
- Caution · With warfarin, coumadin: reduced anticoagulant effect → INR falls (case report: stable INR 2–3 dropped to 1.5)
- Note · 3 recorded drug interactions
- Note · Contraindications or side effects are listed
No rule in our tables for this herb: pregnancy, breastfeeding, dose ceiling. This is not a safety clearance.
Traditionally used for
- Cough & breathing
- Digestion
- Fertility & vitality
- Sleep
- Mood & calm
- Heart & circulation
- Energy & fatigue
☯ TCM Properties
Powerfully tonifies Yuan Qi; Tonifies Spleen and Stomach Qi; Tonifies Lung Qi; Generates Body Fluids and stops thirst; Tonifies Heart Qi and calms the Spirit; Treats impotence
Traditional Chinese Uses
Ren Shen (ginseng root) is considered the most important single herb in Chinese medicine for supplementing the body's primal Qi. It is used for collapse of Qi — acute exhaustion with cold limbs and faint pulse — and for chronic deficiency of Spleen, Lung, and Heart Qi presenting as fatigue, poor appetite, shortness of breath, and palpitations. It generates Body Fluids for wasting-thirst patterns, and calms the Spirit for anxiety and insomnia. Its profound tonic action makes it the benchmark against which all other Qi tonics are measured.
Western Herbalism Properties
Pharmacological Effects
- Behavioral / antifatigue: Ginseng extract improved running and radio-operator performance vs placebo in humans; ginsenoside Rg1 (10 mg/kg i.p.) improved discrimination, maze and avoidance learning in rats; extract prolonged swimming endurance in mice.
- Potentiation of nerve growth factor: Ginsenosides Rb1 and Rd potentiated NGF-induced neurite outgrowth in chick embryonic ganglia cultures; Rg1 inactive.
- Other CNS effects: Small doses stimulate and large doses inhibit medullary vomiting and respiratory centres; large doses tranquilizing; aqueous extract anticonvulsant against strychnine and antagonized cocaine shock in mice, mainly via ginsenoside Rb1.
- Nucleic acid and protein metabolism: Extract increased hepatic/renal RNA synthesis, RNA polymerase activity, serum protein and HDL, and bone-marrow DNA/protein synthesis in rats; ginsenoside Rd most active on protein synthesis.
- Carbohydrate metabolism: Total ginsenosides and ginsenoside Rg1 lowered blood sugar in alloxan-diabetic rodents; polysaccharides lowered blood sugar, apparently via increased insulin release.
- Lipid metabolism: Ginsenosides lowered plasma cholesterol and triglycerides in hypercholesterolemic rats and prevented aortic atheroma in rabbits; Rb1 lowered LDL and raised HDL; most ginsenosides antagonized ACTH/insulin lipolysis.
- Hypothalamic-pituitary-adrenal axis: Ginsenosides raised plasma ACTH and corticosterone in rats, blocked by dexamethasone, indicating action on hypothalamus/pituitary; adrenal function potentiated without atrophy.
- Sexual development: Extract hastened puberty and increased uterine/ovarian weight in young mice and sperm count in rabbits, via increased gonadotropin secretion (absent in hypophysectomized animals).
- Immunologic effects: Ginsenosides and polysaccharides stimulated reticuloendothelial phagocytosis and antibody production in rodents, restored cyclophosphamide/cortisone-suppressed immunity, and increased NK activity, IFN and IL-2 in sarcoma-bearing mice.
- Antitumor / anticarcinogenic: Several ginsenosides, essential oil and polysaccharides inhibited tumors in vitro and in mice; red ginseng extract attenuated chemical carcinogenesis; synergy with tegafur and cyclophosphamide.
- Hematopoietic: Extract increased red and white cells and hemoglobin in normal and anemic animals via increased marrow DNA/RNA/protein synthesis.
- Renal protection: Ginseng saponin (25 mg/kg orally, 30 days) in subtotally nephrectomized rats reduced uremic toxins and proteinuria, restored catalase/SOD and reduced hydroxyl radicals.
- Antinarcotic: Standardized extract G115 (50-400 mg/kg) inhibited morphine tolerance, dependence and dopamine receptor supersensitivity in mice without antagonizing morphine analgesia.
Source: Zhu YP. Chinese Materia Medica: Chemistry, Pharmacology and Applications. Harwood Academic, 1998, p. 549.
Used In Formulas (222)
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Botanical Description
Panax ginseng is a slow-growing perennial herb reaching 30-60 cm tall. The plant has a single stem bearing a whorl of 2-6 palmately compound leaves with 5 leaflets each 5-15 cm long. A single umbel of small greenish-white flowers is borne at the top of the stem, followed by red berries. The characteristic taproot (the medicinal part) is fleshy, cylindrical, often branched, with fine root hairs, pale yellow-tan in color, resembling a human figure. Wild plants take 5-7 years or more to mature for harvest; cultivated roots are typically grown for 4-6 years.
Cool, shaded, moist hardwood forest understory; native to northeastern China (Manchuria), Korean Peninsula, and far eastern Russia. Now almost entirely cultivated due to depletion of wild populations.
Panax ginseng is critically endangered in the wild due to centuries of overharvesting and habitat destruction. Wild ginseng commands extremely high prices and wild populations are nearly extinct outside protected areas. The vast majority of commercial ginseng is now cultivated, primarily in China, South Korea, and North America (P. quinquefolius). CITES Appendix II listed.
Active Constituents
Ginsenosides (Rb1, Rg1, Re, Rd, Rc, Rg3)
Dammarane-type triterpenoid saponinsConcentration: approx. 2-6% of dried root (total ginsenosides)
The principal bioactive markers of ginseng. They are broadly adaptogenic, immunomodulatory and neuroprotective. Panaxadiol-type saponins such as Rb1 tend to be CNS-depressant and hypotensive, whereas panaxatriol-type saponins such as Rg1 are CNS-stimulant and mildly hypertensive, which is thought to underlie ginseng's balancing (adaptogenic) reputation. Rg3 shows the most studied anti-tumour and anti-angiogenic activity.
Ginseng polysaccharides (panaxans A-U, ginsan)
Acidic and neutral polysaccharidesConcentration: qualitative (a major fraction of the crude drug by weight)
Immunostimulant, promoting macrophage and NK-cell activity and cytokine release; the panaxan fraction contributes much of ginseng's documented hypoglycaemic activity in animal models.
Polyacetylenes (panaxynol/falcarinol, panaxydol, panaxytriol)
C17 polyacetylenic alcoholsConcentration: qualitative (minor, lipophilic fraction)
Antiplatelet and cytotoxic to cultured tumour cell lines; contribute to ginseng's inhibitory effect on platelet aggregation and thromboxane formation.
Panaxans (peptidoglycans/glycopeptides)
GlycopeptidesConcentration: qualitative (minor)
Reported to lower blood glucose in experimental models, reinforcing the polysaccharide-mediated hypoglycaemic effect.
Maltol
Pyranone (formed on steaming/red-ginseng processing)Concentration: qualitative (trace, higher in red ginseng)
Antioxidant; a Maillard-type product generated during the steaming that converts white ginseng into red ginseng and a marker of that processing.
Gomisin-free volatile oil (sesquiterpenes: panasinsene, bicyclogermacrene)
Essential (volatile) oilConcentration: qualitative (<0.5%)
Contributes the characteristic aroma; minor anti-inflammatory and spasmolytic activity.
⚠ Drug Interactions
Warfarin
Panax ginseng has been reported to reduce the INR of patients stabilised on warfarin, likely through induction of warfarin metabolism and/or antagonism of its anticoagulant action. Note that this opposes the mild antiplatelet effect of the polyacetylenes, so the net clinical effect is variable.
Clinical note: Monitor INR closely if ginseng is started or stopped in a warfarin-treated patient.
Antidiabetic agents (insulin, sulfonylureas, metformin)
Ginseng polysaccharides and ginsenosides lower blood glucose; combined with glucose-lowering drugs this can produce additive hypoglycaemia.
Clinical note: Monitor blood glucose; anticipate possible dose adjustment of antidiabetic therapy.
Monoamine oxidase inhibitors (e.g. phenelzine)
Case reports describe headache, insomnia and hypomania when ginseng was combined with the MAOI phenelzine; a stimulant/monoaminergic additive effect is proposed.
Clinical note: Avoid concurrent use with MAOIs unless closely supervised.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction (decocted separately) | 3–9 g | Daily | — | — | 中国药典 2020 【用法与用量】3～9g，另煎兑服；也可研粉吞服，一次 2g，—日2次。 【注意】不宜与藜芦、五灵脂同用。 【性味与归经】甘、微苦，微温。归脾、肺、心、肾经。 — Chinese Pharmacopoeia 2020, quoted verbatim; route and cautions preserved. Replaces a cleared category-filler value. |
Dosage Calculator
⚖ Dosage Calculator
A weight-based mathematical estimate for Ren Shen. Not a prescription.
Preparation Methods
White ginseng (sheng shai shen, sun-dried)
Parts: root
The peeled or unpeeled root is simply dried. This milder form tonifies Qi and generates fluids and is preferred when there is heat or Yin deficiency. Because ginseng is costly and its actives are heat-stable but the classic caution is to preserve potency, the sliced root is typically decocted separately (ling jian) over low heat and the strained liquid added to the finished decoction; a common dose is 3-9 g (up to 15-30 g for collapse/rescue).
Red ginseng (hong shen, steamed then dried)
Parts: root
The fresh root is steamed and then dried, turning it reddish and generating maltol and specific ginsenosides such as Rg3. Red ginseng is warmer and more strongly tonifying to Yang and Qi, favoured for cold, deficient and collapse patterns. Prepared and dosed as for white ginseng, usually decocted separately and combined.
Powder / capsule (chong fu)
Parts: root
Finely ground root taken directly by swallowing with warm water, 1-2 g once or twice daily, to conserve the expensive material and for chronic Qi tonification.
Dui Yao — Herb Pairs
The classical two-herb combinations this herb appears in, each with an action neither herb has alone.
Spleen qi is tonified while dampness is dried, strengthening transformation and transport.
Core pair of a classical formula — Si Jun Zi Tang, Tai Ping Hui Min He Ji Ju Fang
The middle burner is warmed and cold dispelled while spleen qi is tonified, treating deficiency cold of spleen and stomach.
Core pair of a classical formula — Li Zhong Wan, Shang Han Lun (Zhang Zhongjing)
Lung qi is tonified while the kidney is helped to grasp qi, arresting chronic wheezing from deficiency.
Core pair of a classical formula — Ren Shen Ge Jie San, Wei Sheng Bao Jian (Luo Tianyi)
Essence and blood are nourished while qi is tonified, supporting the righteous qi to stop chronic deficiency malaria.
Core pair of a classical formula — He Ren Yin, Jing Yue Quan Shu (Zhang Jingyue)
Lung and kidney qi are tonified together to help the kidney grasp qi and calm chronic deficiency wheezing.
Core pair of a classical formula — Ren Shen Hu Tao Tang, Ji Sheng Fang (Yan Yonghe)
Together they give a broad, powerful tonification of original, spleen and lung qi.
Named pairing — Bensky et al., Chinese Herbal Medicine: Materia Medica (3rd ed.)
Qi is tonified while yin and fluids are nourished, treating combined qi and yin exhaustion.
Wu Wei Zi completes the formula by astringing.
Core pair of a classical formula — Sheng Mai San, Yi Xue Qi Yuan (Zhang Yuansu)
Original qi is powerfully tonified while yang is restored, rescuing collapse of yang qi.
Emergency use for cold limbs, profuse cold sweat and faint pulse; stop once the condition stabilises.
Core pair of a classical formula — Shen Fu Tang, Zheng Ti Lei Yao (Xue Ji)
Evidence Tier
2 systematic reviews on recordRecorded studies by study design, strongest design at the top. This is a study-design tier only, not a GRADE rating: it does not weigh risk of bias, consistency or precision.
Systematic review / meta-analysis
2
2 verified · 0 unverified
Randomized controlled trial
0
Other clinical trial
0
Observational / case report
0
In vitro / animal
0
Other / unclassified
0
Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description
Clinical Studies
Panax ginseng in randomised controlled trials: a systematic review
Reviewed 65 RCTs of Panax ginseng across domains including psychomotor and physical performance, glucose metabolism, respiratory disease, erectile dysfunction and quality of life. The authors concluded that many trials suggest benefit but methodological quality was often limited, so definitive efficacy claims require larger rigorous trials.
The effect of ginseng (the genus Panax) on glycemic control: a systematic review and meta-analysis of randomized controlled clinical trials
Meta-analysis of 16 RCTs found that ginseng significantly improved fasting blood glucose compared with control in people with and without diabetes, though effects on HbA1c and fasting insulin did not reach significance. The overall evidence supports a modest glucose-lowering effect.
Practitioner Notes
Philip, LAc
This is the most tonifying herb. Rescues qi.
⚠ Safety & Contraindications
Contraindications
It should not be used together with Radix et Rhizoma Veratri Nigri ( li lu ) and Faeces Trogopterori ( wu ling zhi ). Its use is prohibited in patients with excess or heat pattern.
Source: Xi S, Gong Y. Essentials of Chinese Materia Medica and Medical Formulas. Academic Press/Elsevier, 2017, pp. 330–340.
Side Effects
- 3% ginseng tincture up to 100 ml caused slight irritation and excitation; at 200 ml urticaria, itching, headache, dizziness, hemorrhaging and insomnia were reported.
Source: Zhu YP. Chinese Materia Medica: Chemistry, Pharmacology and Applications. Harwood Academic, 1998, p. 549.
⚠ Rule-Based Cautions
These entries come from the deterministic rule tables that gate Verscienta's formula tools — classical pair prohibitions, pregnancy and lactation contraindications, dose ceilings, and drugs outside the Chinese Pharmacopoeia. The botanical-genus entries are different: advisory notes are not part of the safety screen; the Aristolochia genus check is.
Incompatibilities (十八反 / 十九畏)
- 十八反: Li Lu × Ren Shen — avoid combining with Li Lu / Veratrum
- 十九畏: Ren Shen × Wu Ling Zhi — avoid combining with Wu Ling Zhi / Trogopterus
Historical Texts
Shennong Bencao Jing (Divine Husbandman's Classic of Materia Medica)
Han dynasty, c. 200 CEBencao Gangmu (Compendium of Materia Medica), Li Shizhen
Ming dynasty, 1578 CEReferences
- Bensky D, Clavey S, Stoger E. Chinese Herbal Medicine: Materia Medica, 3rd edition . Eastland Press, Seattle (2004) [DOI]
- Chinese Pharmacopoeia Commission. Pharmacopoeia of the People's Republic of China, Volume I (Renshen / Ginseng Radix et Rhizoma) . China Medical Science Press, Beijing (2020) [DOI]
- Shergis JL, Zhang AL, Zhou W, Xue CC. Panax ginseng in randomised controlled trials: a systematic review . Phytotherapy Research (2013) [DOI]
- Shishtar E, Sievenpiper JL, Djedovic V, et al.. The effect of ginseng (the genus Panax) on glycemic control: a systematic review and meta-analysis of randomized controlled clinical trials . PLoS ONE (2014) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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