Description
American ginseng
Panax quinquefolium
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,” meaning it is 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 ginseng studies have used Panax ginseng (Asian ginseng). There is some evidence that Panax ginseng may:
- Help boost the immune system
- Reduce the risk of cancer
- Improve mental performance and well being
Laboratory studies in animals have found that 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 A G has focused on a number of conditions, including the following.
Diabetes
Several human studies show thatPanax quinquefolius 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. Other studies suggest that Panax quinquefolius prevents diabetes-related complications including retinal and cardiac functional changes by reducing stress. More research is needed.
One study in mice found that the Panax quinquefolius berry was more effective at lowering blood sugar levels than the root.
Cancer
American ginseng has been shown to inhibit tumor growth. In one laboratory study on colorectal cancer cells, researchers found thatPanax quinquefolius 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 those who took a placebo.
Attention deficit hyperactivity disorder (ADHD)
One preliminary study suggests thatPanax quinquefolius , in combination with ginkgo (Ginkgo biloba), may help treat ADHD. More research is needed.
Immune system enhancement
Some scientists believe Panax quinquefolius 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 that American ginseng does boost the performance of cells that play a role in immunity.
Cognition
Preliminary studies suggest thatPanax quinquefolius may improve cognition. More research is needed.
Plant Description
The Panax quinquefolius 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 becausePanax quinquefolius is not ready for use until it has grown for about 6 years. Panax quinquefolius is endangered in the wild. So it tends to be expensive. It is now being grown on farms to protect wild Panax quinquefolius 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.
Available Forms
American ginseng (dried) is available in water, water and alcohol, 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 Panax quinquefolius
Pediatric
American ginseng is not recommended for use in children except under a doctor’s supervision.
Adult
Available forms include:
- Standardized extract
- Fresh root
- Dried root
- Tincture (1:5)
- Fluid extract (1:1)
Precautions
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 that is 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:
- High blood pressure
- Insomnia
- Restlessness
- Anxiety
- Euphoria
- Diarrhea
- Vomiting
- Headache
- Nosebleed
- Breast pain
- Vaginal bleeding
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 doctors. 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 schizophrenia or 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.
Possible Interactions
If you are being treated with any of the following medications, you should not use ginseng without talking to your doctor:
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 takingPanax quinquefolius 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
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