The name "ginseng" is used to refer to both American (Panax quinquefolius) and Asian or Korean ginseng (Panax ginseng), which belong to the genus Panax and have a somewhat similar chemical makeup. Both Asian and American ginseng contain ginsenosides (substances that are thought to give ginseng its medicinal properties), although they contain different types in different amounts. Siberian ginseng or Eleuthero (Eleutherococcus senticosus), on the other hand, is an entirely different plant with different effects. It is distantly related to ginseng, but it does not contain the same active ingredients.
Like Asian ginseng, American ginseng is a light tan, gnarled root that often looks like a human body with stringy shoots for arms and legs. Native Americans used the root as a stimulant and to treat headaches, fever, indigestion, and infertility. Ginseng remains one of the most popular herbs in the United States.
Ginseng is sometimes called an "adaptogen," an herb that helps the body deal with various kinds of stress, although there is no scientific evidence to prove the benefit of adaptogens.
Most studies have used Panax ginseng (Asian ginseng). There is some evidence that Panax ginseng may help boost the immune system, reduce risk of cancer, and improve mental performance and well being. Laboratory studies in animals have found that American ginseng is effective in boosting the immune system, and as an antioxidant. Other studies show that American ginseng might have therapeutic potential for inflammatory diseases. Research on American ginseng has focused on a number of conditions, some of which are described below.
Several human studies found that American ginseng lowered blood sugar levels in people with type 2 diabetes. The effect was seen both on fasting blood sugar and on postprandial (after eating) glucose levels. One study found that people with type 2 diabetes who took American ginseng before or together with a high sugar drink experienced less of an increase in blood glucose levels. However, more research is needed.
One study using mice found that the American ginseng berry was more effective at lowering blood sugar levels than the root.
American ginseng has been shown to inhibit tumor growth. In one laboratory study on colorectal cancer cells, researchers found that American ginseng possessed powerful anti-cancer properties.
Colds and flu
In two studies, people who took a specific product called Cold FX for 4 months got fewer colds than people who took a placebo, and those who got colds found their symptoms did not last as long compared to people who took a placebo.
Attention deficit hyperactivity disorder (ADHD)
One preliminary study suggests that American ginseng, in combination with ginkgo (Ginkgo biloba), may help treat ADHD. More research is needed.
Immune system enhancement
Some scientists believe American ginseng enhances the immune system. In theory, this improvement in immune function could help the body fight off infection and disease.Several clinical studies have shown thatAmerican ginsengdoes boost the performanceof cells playing a role in immunity.
The American ginseng plant has leaves that grow in a circle around a straight stem. Yellowish-green umbrella-shaped flowers grow in the center and produce red berries. Wrinkles around the neck of the root tell how old the plant is. This is important because American ginseng is not ready for use until it has grown for about 6 years. American ginseng is very expensive and is endangered in the wild. It is now being grown on farms to protect wild American ginseng from over-harvesting.
What's It Made Of?
American ginseng products are made from ginseng root and the long, thin offshoots called root hairs. The main chemical ingredients of American ginseng are ginsenosides and polysaccharide glycans (quinquefolans A, B, and C). American ginseng seems to be more relaxing than Asian ginseng, which may have stimulating effects.
American ginseng (dried) is available in water, water and alcohol, or alcohol liquid extracts, and in powders, capsules, and tablets. American ginseng is available with other herbs in several combination formulas.
Be sure to read the label carefully so that you are purchasing the type of ginseng that you want. If you are looking for Asian ginseng, make sure you buy Korean, red, or Panax ginseng. If you are looking for American ginseng, you should buy Panax quinquefolius. Eleuthero (Eleutherococcus senticosus), which is sometimes called Siberian ginseng, may also be found in health food stores or pharmacies. It does not have the same active ingredients as Asian or American ginseng.
How to Take It
American ginseng is not recommended for use in children except under a doctor's supervision.
Available forms include
The use of herbs is a time honored approach to strengthening the body and treating disease. Herbs, however, contain components that can trigger side effects and interact with other herbs, supplements, or medications. For these reasons, you should take herbs with care, under the supervision of a health care provider qualified in the field of botanical medicine. Always tell your doctor about any herbs you may be taking.
Side effects are rare but may include:
To avoid hypoglycemia (low blood sugar), even in people without diabetes, take American ginseng with food.
People with hypertension (high blood pressure) should not take American ginseng products without the close supervision of their doctor. At the same time, people with low blood pressure, as well as those with an acute illness, should use caution when taking American ginseng.
People with bipolar disorder should not take ginseng, because it may increase the risk of mania.
Pregnant or breastfeeding women should not take American ginseng.
Women who have a history of breast cancer, or other hormone-sensitive conditions,should not take ginseng.
Stop taking American ginseng at least 7 days prior to surgery. American ginseng can lower blood glucose levels and could create problems for patients fasting before surgery. In addition, American ginseng may act as a blood thinner, increasing the risk of bleeding during or after the procedure.
If you are being treated with any of the following medications, you should not use ginseng without first talking to your health care provider:
Medications for diabetes -- American ginseng may lower blood sugar levels, so it could interfere with the effectiveness of prescription drugs for diabetes. Talk to your doctor before taking American ginseng if you are taking medicines for diabetes, including insulin and oral hypoglycemic agents such as metformin (Glucophage).
Blood-thinning medications (anticoagulants) -- One small study suggested that American ginseng might decrease the effectiveness of warfarin (Coumadin), a blood thinning medication. If you take any blood-thinning medications, ask your doctor before taking ginseng.
MAOIs (monoamine oxidase inhibitors) -- Ginseng may increase the risk of side effects when taken with MAOIs, a type of antidepressant. There have been reports of interaction between ginseng and phenelzine (Nardil) causing headaches, tremors, and mania. MAOIs include:
Antipsychotic medications -- American ginseng may increase the effects of medications used to treat psychiatric disorders such as schizophrenia and bipolar disorder, so they should not be taken together.
Stimulants -- Ginseng may increase the stimulant effect and side effects of some medications take for attention deficit hyperactivity disorder, including amphetamine and dextroamphetamine (Adderall) and methylphenidate (Concerta, Ritalin).
Morphine -- Asian ginseng may block the painkilling effects of morphine.
Adams LL, Gatchel RJ. Complementary and alternative medicine: applications and implications for cognitive functioning in elderly populations. Alt Ther. 2000;7(2):52-61.
Andrade AS, Hendrix C, Parsons TL, Caballero B, Yuan CS, Flexner CW, et al. Pharmacokinetic and metabolic effects of American ginseng (Panax quinquefolius) in healthy volunteers receiving the HIV protease inhibitor indinavir. BMC Complement Altern Med. 2008 Aug 19;8:50.
Ang-Lee MK, Moss J, Yuan C-S. Herbal medicines and perioperative care. JAMA. 2001;286(2):208-216.
Banz WJ, Iqbal MJ, Bollaert M, Chickris N, James B, Higginbotham DA, et al. Ginseng modifies the diabetic phenotype and genes associated with diabetes in the male ZDF rat. Phytomedicine. 2007 Oct;14(10):681-9.
Barton DL, Soori GS, Bauer BA, Sloan JA, Johnson PA, Figueras C, Duane S, Mattar B, Liu H, Atherton PJ, Christensen B, Loprinzi CL. Pilot study of Panax quinquefolius (American ginseng) to improve cancer-related fatigue: a randomized, double-blind, dose-finding evaluation: NCCTG trial N03CA. Support Care Cancer. 2010;18(2):179-87
Biondo PD, Robbins SJ, Walsh JD, McCargar LJ, Harber VJ, Field CJ. A randomized controlled crossover trial of the effect of ginseng consumption on the immune response to moderate exercise in healthy sedentary men. Appl Physiol Nutr Metab. 2008 Oct;33(5):966-75.
Carai MAM, Agabio R, Bombardelli E, et al. Potential use of medicinal plants in the treatment of alcoholism. Fitoterapia. 2000;71:S38-S42.
Dey L, Xie JT, Wang A, et al. Anti-hyperglycemic effects of ginseng: comparison between root and berry. Phytomedicine. 2003;10(6-7):600-5.
Dougherty U, Mustafi R, Wang Y, Musch MW, Wang CZ, Konda VJ, Kulkarni A, HartJ, Dawson G, Kim KE, Yuan CS, Chang EB, Bissonnette M. American ginseng suppresses Western diet-promoted tumorigenesis in model of inflammation-associated colon cancer: role of EGFR. BMC Complement Altern Med. 2011;11:111.
Fu Y, Ji LL. Chronic ginseng consumption attenuates age-associated oxidative stress in rats. J Nutr. 2003;133(11):3603-9.
Harkey MR, Henderson GL, Gershwin ME, et al. Variability in commercial ginseng products: an analysis of 25 preparations. Am J Clin Nutr. 2001;73:1101-1106.
Heck AM, DeWitt BA, Lukes AL. Potential interactions between alternative therapies and warfarin. Am J Health Syst Pharm. 2000;57(13):1221-1227.
Hsu CC, Ho MC, Lin LC, et al. American ginseng supplementation attenuates creatine kinase level induced by submaximal exercise in human beings. World J Gastroenterol. 2005;11(34):5327-31.
Ichikawa T, Li J, Nagarkatti P, et al. American ginseng preferentially suppresses STAT/iNOS signaling in activated macrophages. j Ethnopharmocal. 2009;125(1):145-50.
Izzo AA, Ernst E. Interactions between herbal medicines and prescribed drugs: a systematic review. Drugs. 2001;61(15):2163-2175.
Karmazyn M, Moey M, Gan XT. Therapeutic potential of ginseng in the management of cardiovascular disorders. Drugs. 2011;71(15):1989-2008. doi: 10.2165/11594300-000000000-00000.
King ML, Adler SR, Murphy LL. Extraction-dependent effects of American ginseng (Panax quinquefolium) on human breast cancer cell proliferation and estrogen receptor activation. Integr Cancer Ther. 2006;5(3):236-43.
LaValle JB, Krinsky DL, Hawkins EB, et al. Natural Therapeutics Pocket Guide. Hudson, OH:LexiComp; 2000: 442-444.
Lee NH, Son CG. Systematic review of randomized controlled trials evaluating the efficacy and safety of ginseng.[Review]. J Acupunct Meridian Stud. 2011;4(2):85-97.
Li XL, Wang CZ, Sun S, et al. American ginseng berry enhances chemopreventive effect of 5-FU on human colorectal cancer cells. Oncol Rep. 2009; 22(4):943-52.
Luo X, Wang CZ, Chen J, et al. Characterization of gene expression regulated by American ginseng and ginsenoside Rg3 in human colorectal cancer cells. Int J Oncol. 2008; 32(5):975-83.
Lyon MR, Cline JC, Totosy de Zepetnek J, et al. Effect of the herbal extract combination Panax quinquefolium and Ginkgo biloba on attention-deficit hyperactivity disorder: a pilot study. J Psychiatry Neurosci. 2001;26(3):221-228.
McElhaney JE, Goel V, Toane B, et al. Efficacy of COLD-fX in the prevention of respiratory symptoms in community-dwelling adults: a randomized, double-blinded, placebo controlled trial. J Altern Complement Med. 2006;12(2):153-7.
Mantle D, Lennard TWJ, Pickering AT. Therapeutic applications of medicinal plants in the treatment of breast cancer: a review of their pharmacology, efficacy and tolerability. Adverse Drug React Toxicol Rev. 2000;19(3):2223-240.
Mantle D, Pickering AT, Perry AK. Medicinal plant extracts for the treatment of dementia: a review of their pharmacology, efficacy, and tolerability. CNS Drugs. 2000;13:201-213.
Predy GN, Goel V, Lovlin R, et al. Efficacy of an extract of North American ginseng containing poly-furanosyl-pyranosyl-saccharides for preventing upper respiratory tract infections: a randomized controlled trial. CMAJ. 2005;173(9):1043-8.
Scholey A, Ossoukhova A, Owen L, Ibarra A, Pipingas A, He K, Roller M, Stough C. Effects of American ginseng (Panax quinquefolius) on neurocognitive function:an acute, randomised, double-blind, placebo-controlled, crossover study. Psychopharmacology (Berl).2010;212(3):345-56.
Seida JK, Durec T, Kuhle S. North American (Panax quinquefolius) and Asian Ginseng (Panax ginseng) Preparations for Prevention of the Common Cold in Healthy Adults: A Systematic Review. Evid Based Complement Alternat Med. 2009. [Epub ahead of print]
Sui DY, Yu XF, Qu SC, et al. [Protective effect of Panax quinquefolium 20s-proto-panaxdiolsaponins on acute myocardial infarction in dogs]. Zhongguo Zhong Yao Za Zhi. 2001;26(6):416-9.
Sung J, Han KH, Zo JH, et al. Effects of red ginseng upon vascular endothelial function in patients with essential hypertension. Am J Chin Med. 2000;28(2):205-216.
Vaes LP, Chyka PA. Interactions of warfarin with garlic, ginger, ginkgo, or ginseng: nature of the evidence. Ann Pharmacother. 2000;34(12):1478-1482.
Vladimir V, Sievenpiper JL, Koo VY, et al. American ginseng (Panax quinquifolius L) reduces postprandial glycemia in nondiabetic subjects and subjects with type 2 diabetes mellitus. Arch Intern Med. 2000;160(7):1009-1013.
Vohra S, Johnston BC, Laycock KL, Midodzi WK, Dhunnoo I, Harris E, Baydala L. Safety and tolerability of North American ginseng extract in the treatment of pediatric upper respiratory tract infection: a phase II randomized, controlled trial of 2 dosing schedules. Pediatrics. 2008 Aug;122(2):e402-10.
Vuksan V, Sievenpiper JL, Koo VYY, et al. American ginseng (Panax quinquefolius L) reduces postprandial glycemia in nondiaetic subjects and subjects with type 2 diabetes mellitus. Arch Intern Med. 2000;160:1009-1013.
Vuksan V, Sievenpiper JL, Xu Z, et al. Konjac-mannan and American ginseng: emerging alternative therapies for type 2 diabetes mellitus. J Am Coll Nutr. 2001;20(5):370S-380S.
Vuksan V, Stavro MP, Sievenpiper JL, et al. Similar postprandial glycemic reactions with escalation of dose and administration time of American ginseng in type 2 diabetes. Diabetes Care. 2000;23:1221-1226.
Wang M, Guilbert LJ, Li J, et al. A proprietary extract from North American ginseng (Panax quinquefolium) enhances IL-2 and IFN-gamma productions in murine spleen cells induced by Con-A. Int Immunopharmacol. 2004;4(2):311-5.
Wargovich MJ. Colon cancer chemoprevention with ginseng and other botanicals. J Korean Med Sci. 2001;16 Suppl:S81-S86.
Wu CF, Liu YL, Song M, et al. Protective effects of pseudoginsenoside-F11 on methamphetamine-induced neurotoxicity in mice. Pharmacol Biochem Behav. 2003;76(1):103-9.
Wu Z, Luo JZ, Luo L. American ginseng modulates pancreatic beta cell activities. Chin Med. 2007 Oct 25;2:11.
Xie JT, Wang CT, Li XL, Ni M, Fishbein A, Yuan CS. American ginseng and Scutellaria baicalensis using an ob/ob mice model. Fitoterapia. 2009;80(5):306-11.
Yeh GY, Eisenberg DM, Kaptchuk TJ, et al. Systematic review of herbs and dietary supplements for glycemic control in diabetes. Diabetes Care. 2003;26(4):1277-94.
Yuan CS, Wei G, Dey L, et al. Brief communication: American ginseng reduces warfarin's effect in healthy patients: a randomized, controlled Trial. Ann Intern Med 2004;141(1):23-27.
Review Date: 3/2/2012
Reviewed By: Steven D. Ehrlich, NMD, Solutions Acupuncture, a private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network.
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