Astragalus (Astragalus membranaceus) has been used in Traditional Chinese Medicine (TCM) for thousands of years. It was often combined with other herbs to strengthen the body against disease. Astragaus is called an adaptogen, meaning it helps protect the body against various stresses, including physical, mental, or emotional stress.
Astragalus may help protect the body from diseases such as cancer and diabetes. It contains antioxidants, which protect cells against damage. Astragalus is used to protect and support the immune system, preventing colds and upper respiratory infections, lowering blood pressure, treating diabetes, and protecting the liver.
Astragalus has antibacterial and anti-inflammatory properties. People sometimes use it on the skin for wound care. In addition, studies have shown that astragalus has antiviral properties and stimulates the immune system, suggesting that it may help prevent colds.
In the United States, researchers have looked at astragalus as a possible treatment for people whose immune systems have been weakened by chemotherapy or radiation. In these studies, astragalus supplements seem to help people recover faster and live longer. Research on using astragalus for people with AIDS has produced mixed results.
Recent research in China suggests that, because astragalus is an antioxidant, it may help people with severe forms of heart disease, relieving symptoms, lowering cholesterol levels, and improving heart function. At low-to-moderate doses, astragalus has few side effects. However, it does interact with a number of other herbs and prescription medications. Astragalus may also be a mild diuretic, meaning it helps rid the body of excess fluid.
Astragalus is a perennial plant, about 16 to 36 inches tall, that is native to the northern and eastern parts of China, as well as Mongolia and Korea. It has hairy stems with leaves made up of 12 to 18 pairs of leaflets. The root is the medicinal part of the plant, and is usually harvested from 4-year-old plants.
The dried root is used medicinally.
Astragalus has been used for the following:
Astragalus root may be available in a variety of forms:
There is not a lot of scientific evidence about giving astragalus to children, so ask your doctor first. According to TCM, you should not give astragalus to a child with fever because the herb may make the fever last longer or grow stronger. Dosage should be determined by your doctor.
Dosage depends on condition being treated, age, and weight. Work with your physician to determine the safest and most effective dosage for you. Higher doses may suppress the immune system. For best results, use a standardized astragalus supplement. Dosages depend on a number of factors, such as whether astragalus is being used primarily as an adaptogen or for other reasons. People should work with a knowledgeable provider to determine the appropriate dosing schedule for their needs.
At recommended doses, astragalus has no serious side effects and can generally be used safely. It does interact with other herbs and medications (see Possible Interactions section).
Evidence about whether astragalus is safe for women who are breastfeeding or nursing is lacking. Talk to your doctor before taking any medication, including herbs.
People with autoimmune disease should speak with their doctor first before taking Astagalus because it may stimulate the immune system.
Many practitioners recommend against using any single "adaptogenic" herbs over long periods of time. Instead, they might suggest rotating among several "adaptogens" every couple of months.
If you take any of the following medications, you should not use astragalus without first asking your doctor:
Drugs that suppress the immune system: Astragalus may interfere with these drugs. If you have an autoimmune disease, such as rheumatoid arthritis or lupus, or take cyclophosphamide, a medication used to reduce the chances of rejection in transplant recipients, or corticosteroids, do not take astragalus.
Lithium: Astragalus can make it harder for the body to get rid of lithium, so dangerously high levels of the drug could build up.
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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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