Panax Ginseng (Panax ginseng C.A. Meyer)
Panax ginseng — also called Korean ginseng or Asian ginseng — is the dried root of Panax ginseng C.A. Meyer (Araliaceae family). It is one of the most-studied "adaptogens" with a long East-Asian medicinal history. Modern trials are heterogeneous and the UK regulatory position is conservative: there are no authorised Article 13.1 health claims. Distinguish carefully from American ginseng (Panax quinquefolius — different ginsenoside profile) and Siberian "ginseng" (Eleutherococcus senticosus — different family entirely, different evidence base).
Camden Medicals editorial · Last reviewed 2 May 2026 · Next review May 2027
- Cross-checked against
- NHS
- NICE
- BNF
- EFSA
- FSA
Camden's editorial team independently graded each health claim below on the strength of the published evidence — see the grade beside every condition.
- Class
- Botanical
- Typical daily dose
- Standardised extract 200–400 mg/day for general fatigue / cognitive use, often standardised to 4–7 % total ginsenosides. Erectile-function trials use 600–1,000 mg dried-root equivalent / day. Higher doses (>600 mg/day) increase side-effect risk without consistent evidence gain.
- Top use evidence
- Limited
On this page
What it is
Panax ginseng is a perennial plant native to Korea, north-east China, and parts of Russia, with a small slow-growing fleshy root that is the medicinal part. The botanical name "Panax" derives from the Greek panax (cure-all), reflecting its traditional framing.
The bioactive ginsenosides are a family of triterpene saponins classified into protopanaxadiols (Rb1, Rb2, Rc, Rd, Rg3) and protopanaxatriols (Re, Rf, Rg1, Rg2). The total ginsenoside content of dried root is typically 2–5 % w/w; standardised extracts are declared at 4 %, 7 %, or higher. Different ginsenosides have different (and sometimes opposing) pharmacological activities, which partly explains the heterogeneity of clinical results.
Red ginseng is steam-treated white ginseng — the steaming process converts some ginsenosides into rare forms (Rg3, Rk1, Rg5) that have distinct activities. Red and white ginseng are not interchangeable in trial-evidence terms.
Quality issues are well-documented. UK and US market surveys have found mislabelled or low-ginsenoside products on shelves; "Siberian ginseng" (Eleutherococcus senticosus) is a different plant family and is not Panax. Camden's encyclopaedia look-for bar is species + cultivation form (red / white) + ginsenoside standardisation declared.
At a glance
- Dried root of Panax ginseng C.A. Meyer (Korean / Asian ginseng). Standardised by ginsenoside content.
- No UK-authorised health claim. EFSA evaluation on hold. Pending claims include energy, mental performance, immune function — none authorised.
- Best-studied indications are fatigue and cognitive performance; trial evidence is heterogeneous and effect sizes modest.
- Distinguish from Panax quinquefolius (American ginseng) and Eleutherococcus senticosus ("Siberian ginseng" — different family). Substitution / mislabelling has been a documented quality issue.
- Drug-interaction list is significant: warfarin, antiplatelets, antidepressants (especially MAOIs), insulin / sulfonylureas, calcium-channel blockers. Talk to your prescriber before use.
What people use it for
Adults with general fatigue or low energy seeking a botanical adjunct
Trials report modest improvements in subjective fatigue at 200–400 mg/day standardised extract over 4–8 weeks. Effect sizes are smaller than typical placebo-arm gains in fatigue trials. If fatigue is persistent or progressive, see your GP — anaemia, hypothyroidism, depression, sleep apnoea, and chronic disease are the priority differentials. [1]
Some evidenceLimitedAdults wanting cognitive-performance support
Older trials (Reay 2010, Scholey 2010) reported modest acute cognitive effects on working memory and reaction time. Effect sizes are small and not consistently replicated. Not relevant to clinically significant cognitive impairment.
Some evidenceLimitedPost-menopausal women considering a botanical adjunct for energy or hot flushes
Cochrane CD009330 (Lee 2014) reviewed ginseng for menopausal symptoms — modest effect on fatigue, no consistent effect on hot flushes. Trial evidence is small. [3]
Some evidenceLimitedAnyone on prescribed medication, particularly anticoagulants or antidepressants
Talk to your prescriber. The drug-interaction list for Panax ginseng is significant — warfarin INR effects, MAOI serotonergic risk, glycaemic effects on diabetes medication. This is not a casual self-treatment ingredient.
Popular, not provenInsufficient
How it works
Ginsenosides interact with multiple receptor systems and signalling pathways: GABA-A modulation, dopaminergic modulation, oestrogen- receptor binding (Rb1, Rg1), insulin-signalling effects (Rb1, Re), immunomodulation, nitric-oxide signalling, and antioxidant activity via Nrf2 pathway induction. Different ginsenosides have different and sometimes opposing effects, which is why "ginseng" as a category is not a single drug. The clinical translation is dose-, preparation-, and ginsenoside-mix-dependent.
Common myths
Myth"All "ginsengs" are the same."
RealityThey are not. Panax ginseng (Korean / Asian) has different ginsenoside profile from Panax quinquefolius (American), which is different again from Eleutherococcus senticosus ("Siberian ginseng" — actually a different family with no ginsenosides). Trial evidence is preparation-specific; substitution is not.
Myth"More ginseng is better."
RealityAbove ~400 mg/day of standardised extract, evidence does not scale and side effects (insomnia, agitation, hypertension) increase. The clinical-trial dose ceiling is generally 600 mg/day.
Myth"Ginseng is risk-free because it is "natural"."
RealityGinseng has a meaningful drug-interaction profile — warfarin INR effects, MAOI serotonergic risk, blood-glucose modification, and blood-pressure effects. The drug-interaction list alone makes it inappropriate to take alongside multiple prescriptions without prescriber knowledge.
Common online questions
Synthesised from the questions UK shoppers most often ask online about Panax Ginseng (Panax ginseng C.A. Meyer). Each answer is editorial and links to its evidence in the Sources list below.
Korean ginseng or American ginseng — which should I buy?
They are different botanically and have different ginsenoside ratios and trial evidence. Korean / Panax ginseng is the better-studied for fatigue, cognitive performance, and ED. American / Panax quinquefolius is sometimes positioned as gentler / less stimulating. Pick by what is actually labelled, and check that the product names the species explicitly.
How long can I take ginseng?
Older traditional guidance suggests cycling — typically 8–12 weeks on then a 2–4 week break. Modern evidence does not firmly require cycling but most trials run for 8–12 weeks. If you''re still using ginseng after 12 weeks for the same symptom and it isn''t fixed, the symptom needs medical assessment, not a longer course.
I take warfarin — can I take ginseng?
Talk to your anticoagulation team first. Panax ginseng has published case reports of reduced warfarin efficacy (decreased INR), though some trials have not replicated this. Anticoagulation INRs need consistent inputs; adding or stopping ginseng unpredictably is the practical hazard.
Will ginseng raise my blood pressure?
Trials are mixed — some report small increases, others no effect. If you have hypertension, monitor BP for the first 2 weeks of starting and discuss any sustained rise with your GP.
⚖️ The official position
What may lawfully be claimed about Panax Ginseng (Panax ginseng C.A. Meyer) in Great Britain. This is a regulatory position, not an evidence grade.
No health claim is authorised for this use in Great Britain.
Panax Ginseng (Panax ginseng C.A. Meyer) has a history of traditional use. Authorised health claims require a positive EFSA scientific opinion; none has been issued for this use.
🔬 Camden’s evidence review
The research Camden reviewed, graded on its strength. This is our own appraisal — it sits beneath the official guidance above, never above it.
General fatigue / low energy
LimitedEvidencelimitedTrials of standardised extract at 200–400 mg/day report modest reductions in subjective fatigue scores. Heterogeneous and small-scale; not on UK fatigue-pathway guidance. [1]
Menopausal symptoms
LimitedEvidencelimitedCochrane CD009330.pub2 (Lee 2014) reviewed ginseng for menopausal symptoms. Modest effect on fatigue and well-being; no consistent effect on hot flushes. Evidence base small. [3]
Erectile dysfunction
ModerateEvidencemoderateA separate evidence base (mostly red ginseng at 600–1,000 mg dried-root equivalent / day) supports a small effect on erectile function in men with mild-to-moderate ED, though the meta-analysed trials are small and of low methodological quality, so the evidence is suggestive rather than definitive. Not on the UK NHS pathway, which uses PDE-5 inhibitors (sildenafil, tadalafil) as first-line. [5,6]
Type-2 diabetes / glycaemic markers
LimitedEvidencelimitedTrials report modest reductions in fasting glucose and HbA1c with standardised ginseng extract. Not on UK diabetes guidance pathways. Adds glycaemic interaction concern with diabetes medication.
Cognitive function in healthy adults
LimitedEvidencelimitedOlder small acute-dose trials report effects on reaction time and working memory; chronic-dose evidence weaker. The Cochrane review (Geng 2010) found no convincing evidence of a cognitive-enhancing effect. Not relevant to clinically significant cognitive impairment. [7]
Safety
Panax ginseng has a meaningful drug-interaction list and is not a casual self-treatment ingredient. Talk to a clinician before use if you take any prescribed medication, have hypertension, diabetes, or any cardiovascular condition. Avoid in pregnancy. Limit to 8–12 weeks at a time.
Talk to your pharmacist or GP first if you:
- You take warfarin or any anticoagulant — INR monitoring may be affected.
- You take antidepressants (especially MAOIs) — risk of serotonergic effects.
- You take diabetes medication (insulin, sulfonylureas) — possible additive glycaemic lowering.
- You take blood pressure medication or have hypertension.
- You take stimulants (caffeine in significant amounts, ADHD medication).
- You are pregnant, breastfeeding, or trying to conceive — avoid.
- You have a hormone-sensitive condition — Rb1 / Rg1 have weak ER activity.
- You are giving to a child — paediatric ginseng use is not standard.
Common side effects: Insomnia, agitation, headache, gastric upset. Hypertension and breast tenderness reported. Allergic reactions in Araliaceae-family-allergic individuals.
Pregnancy and breastfeeding
Insufficient safety data in pregnancy; some animal teratogenicity data on isolated ginsenosides. Avoid.
Insufficient data; avoid.
Talk to your GP, midwife, or pharmacist before starting any supplement during pregnancy or breastfeeding.
More clinical detail (for clinicians and informed readers)
Contraindications
- Pregnancy and breastfeeding.
- Acute illness / fever (traditional Chinese medicine contraindication; cited in EU / UK herbal monographs).
- Known Araliaceae-family allergy.
- Bipolar disorder (case reports of mania induction).
Drug interactions
- Warfarin — variable effect on INR; flag to anticoagulation team.
- MAOIs (phenelzine, tranylcypromine) — case reports of serotonergic / hypertensive crisis.
- SSRIs — theoretical additive serotonergic effect.
- Insulin / sulfonylureas — additive hypoglycaemia possible; monitor.
- Calcium-channel blockers — possible interaction.
- Stimulants (caffeine, sympathomimetics) — additive stimulant effect.
- CYP3A4-metabolised drugs — possible induction; clinical significance variable.
This is not an exhaustive list. Always tell your prescriber and pharmacist about every supplement you take.
Common side effects
- Insomnia, agitation, restlessness — particularly with afternoon / evening dosing.
- Headache.
- GI symptoms — nausea, gastric upset.
Rare side effects
- Hypertension or palpitations.
- Breast tenderness or menstrual changes.
- Allergic reactions.
- Reports of mania induction in patients with bipolar disorder.
How to take it
- Typical supplemental range
- Standardised extract 200–400 mg/day for general fatigue / cognitive use, often standardised to 4–7 % total ginsenosides. Erectile-function trials use 600–1,000 mg dried-root equivalent / day. Higher doses (>600 mg/day) increase side-effect risk without consistent evidence gain.
- Timing
- Morning dosing preferred — late-day dosing is associated with insomnia.
How to spot quality
Look for
- Panax ginseng C.A. Meyer named explicitly — not generic "ginseng".
- Form named: red (steamed) or white (air-dried) — different ginsenoside profiles.
- Total ginsenoside percentage declared (4 %, 7 %, etc.).
- Single-source country of cultivation (Korea, north-east China).
- GMP-certified manufacture; ideally third-party identity testing (substitution / adulteration is a documented industry issue).
Red flags
- Generic "ginseng" with no species named.
- Substitution: "Siberian ginseng" labelled as ginseng (it is Eleutherococcus, a different family).
- No ginsenoside standardisation.
- Marketing implies immune boost, hormone balancing, or claims of treatment for fatigue.
Commonly combined with
Other ingredients that share a biological pathway, cofactor relationship, or evidence-backed protocol with this one. Mechanisms below cite primary physiology — not folk pairing. Doses are literature ranges, not recommendations. Talk to your pharmacist or GP before changing your stack, especially if you take prescription medication.
Ashwagandha (Withania somnifera)
Limited evidenceAdaptogen-cluster pairing — different mechanisms (Panax ginsenosides vs Withania withanolides).
Panax ginseng ginsenosides Rb1 / Rg1 modulate HPA axis + cholinergic signalling. Ashwagandha withanolides modulate GABA-A + cortisol. Different active classes; mechanism complementary.
Evidence: Camden ashwagandha NB-463 / NB-523 / NB-537 cluster.
Doses studied: 100-400 mg Panax ginseng standardised extract + 300-600 mg KSM-66 ashwagandha daily.
Found in Camden: Aurifera™ Ashwagandha KSM-66® 500mg 90 Capsules · Ashwagandha Gummies 1200mg 60 Gummies · Aurifera™ Shilajit Adaptogen Complex 90 Capsules
Rhodiola (Rhodiola rosea)
Limited evidenceAdaptogen-cluster pairing — Panax ginseng + rhodiola rosea both feature in fatigue / stress-resilience contexts.
Different mechanisms — ginsenosides vs rosavin / salidroside. Mechanism complementary across cortisol / serotonergic axes.
Evidence: Camden rhodiola covers cluster.
Doses studied: 100-400 mg Panax + 200-600 mg rhodiola standardised extract daily.
St John's Wort (Hypericum perforatum)
Limited evidenceDrug-interaction concern cluster — both Panax ginseng and St John's Wort have CYP / monoaminergic interaction profiles requiring prescriber disclosure.
Both modulate CYP3A4 + monoaminergic signalling at different intensities. St John's Wort is the more-aggressive CYP / P-gp inducer; Panax ginseng has modest signals. Both should be disclosed to any prescriber. Camden st-johns-wort is the canonical interaction reference.
Evidence: Camden st-johns-wort is the cluster reference.
Doses studied: Disclose any combination to prescribing GP / pharmacist.