Like all herbs, gingko should be handled and taken with care.
Ginkgo Preparations and Dosage
Ginkgo leaf is available in teas, tinctures, extracts, and capsules. Ginkgo leaves, however, contain toxic substances called alkylphenols. It is best to take ginkgo in capsules, which are standardized for their flavonoid content, because manufacturers remove the alkylphenols during the standardization process.
The unstandardized forms frequently cause headache and gastrointestinal upset. Look for capsules with 24 percent flavonoid content. To receive the same benefits attributed to standardized ginkgo capsules, you would have to consume large quantities of tincture, tea, or powder. These quantities would place you at greater risk for side effects, such as serious headaches and gastrointestinal upset. Most of the studies used 120 mg per day of the 24-percent extract, though some studies used up to 240 mg. Two 60-mg capsules per day or three 40-mg capsules per day is enough for most people.
Ginkgo Precautions and Warnings
For most people, ginkgo is considered safe in recommended doses. If you have memory loss, depression, or the symptoms of atherosclerosis, you should see a physician for a diagnosis and treatment before starting a ginkgo supplement, as these may be signs of serious medical conditions. Patients with a diagnosis of benign senility may safely take ginkgo.
If you have had a stroke or think you are prone to them, don't take ginkgo without your physician's permission. Although it thins the blood, which could be beneficial for one kind of stroke, it also increases circulation to the brain, which could promote another kind.
Side Effects of Ginkgo
Ginkgo promotes circulation in the head and possibly could worsen congestive headaches in those who are prone to them. Because ginkgo inhibits platelets from grouping, it may cause problems for people with clotting disorders or those who take blood-thinning medications. Large quantities of ginkgo may cause irritability, restlessness, diarrhea, and nausea and vomiting.
To learn more about treating common medical conditions at home, try the following links:
- For an overview of all of our herbal remedies, go to the main Herbal Remedies page.
- To learn more about treating medical conditions at home, visit our main Home Remedies page.
- One of the best things you can do for your health and well being is to make sure you are getting enough of the vital nutrients your body needs. Visit our Vitamins page to learn more.
Jennifer Brett, N.D. is director of the Acupuncture Institute for the University of Bridgeport, where she also serves on the faculty for the College of Naturopathic Medicine. A recognized leader in her field with an extensive background in treating a wide variety of disorders utilizing nutritional and botanical remedies, Dr. Brett has appeared on WABC TV (NYC) and on Good Morning America to discuss utilizing herbs for health.This information is solely for informational purposes. IT IS NOT INTENDED TO PROVIDE MEDICAL ADVICE. Neither the Editors of Consumer Guide (R), Publications International, Ltd., the author nor publisher take responsibility for any possible consequences from any treatment, procedure, exercise, dietary modification, action or application of medication which results from reading or following the information contained in this information. The publication of this information does not constitute the practice of medicine, and this information does not replace the advice of your physician or other health care provider. Before undertaking any course of treatment, the reader must seek the advice of their physician or other health care provider.Before engaging in any complementary medical technique, including the use of natural or herbal remedies, you should be aware that many of these techniques have not been evaluated in scientific studies. Use of these remedies in connection with over the counter or prescription medications can cause severe adverse reactions. Often, only limited information is available about their safety and effectiveness. Each state and each discipline has its own rules about whether practitioners are required to be professionally licensed. If you plan to visit a practitioner, it is recommended that you choose one who is licensed by a recognized national organization and who abides by the organization's standards. It is always best to speak with your primary health care provider before starting any new therapeutic technique.