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  • Encyclopedia

Flavonoids

Also indexed as: Bioflavonoids, Citrus Flavonoids, Tangeretin, Courmarin, Diosmin, Hesperidin, Hydroxyethylrutosides, Rutin
Flavonoids: Main Image

Flavonoids are a class of water-soluble plant pigments. Flavonoids are broken down into categories, though the issue of how to divide them is not universally agreed upon. One system breaks flavonoids into isoflavones, anthocyanidins, flavans, flavonols, flavones, and flavanones. Some of the best-known flavonoids, such as genistein in soy, and quercetin in onions, can be considered subcategories of categories. Although they are all structurally related, their functions are different. Flavonoids also include hesperidin, rutin, citrus flavonoids, and a variety of other supplements.

  • Reliable and relatively consistent scientific data showing a substantial health benefit.
  • Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
  • For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

Our proprietary “Star-Rating” system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.

Flavonoids has been used in connection with the following health conditions:

Used for AmountWhy
Chronic Venous Insufficiency
500 mg hydroxyethylrutosides twice per day 3 stars[3 stars] Flavonoids strengthen capillaries. A flavonoid derived from rutin, called HR, has been shown to be effective in clearing leg swelling and reducing other CVI symptoms.
Hepatitis
500 to 750 mg daily of catechins3 stars[3 stars] The flavonoid catechin has helped people with acute viral hepatitis, as well as people with chronic hepatitis.
Bruising
400 to 800 mg hesperidin with vitamin C daily 2 stars[2 stars] Flavonoids are often recommended with vitamin C. Flavonoids are vitamin-like substances that can help strengthen capillaries and therefore may also help with bruising.
Cold Sores
(Vitamin C)
200 mg with 200 mg flavonoids, three to five times daily2 stars[2 stars] Vitamin C plus flavonoids may help speed cold sore healing.
Gingivitis
(Vitamin C)
300 mg of vitamin C, plus 300 mg of flavonoids daily2 stars[2 stars] In one study, supplementing with vitamin C plus flavonoids improved gum health in a group of people with gingivitis.
Hemorrhoids
600 to 4,000 mg hydroxyethylrutosides daily or 1 to 3 grams of a mixture of 90% diosmin and 10% hesperidin2 stars[2 stars] Supplementing with flavonoids may reduce symptoms. A number of flavonoids have been shown to have anti-inflammatory effects and to strengthen blood vessels
Ménière’s Disease
Refer to label instructions 2 stars[2 stars] Certain flavonoids, known as hydroxyethylrutosides, have been reported to improve symptoms of Ménière’s disease, including hearing problems.
Allergies and Sensitivities
Refer to label instructions 1 star[1 star] Test tube and animal studies have found some effects from natural antihistamines such as flavonoids, though no clinical research has shown whether these substances can specifically reduce allergic reactions.
Capillary Fragility
Refer to label instructions 1 star[1 star] Flavonoids may help strengthen weakened capillaries, possibly by protecting collagen, one of the most important components of capillary walls.
Gingivitis
Refer to label instructions 1 star[1 star] Shown to be effective against gingivitis when taken with vitamin C, flavonoids also appear to be effective by themselves at reducing gum inflammation.
Measles
Refer to label instructions 1 star[1 star] Flavonoids are nutrients found in the white, pithy parts of fruits and vegetables. Certain flavonoids have been found to inhibit the infectivity of measles virus in the test tube.
Menopause
Refer to label instructions 1 star[1 star] A preliminary trial reported that a combination of vitamin C and the flavonoid hesperidin helped relieve hot flashes in menopausal women.
Menorrhagia
Refer to label instructions 1 star[1 star] Flavonoids protect capillaries (small blood vessels) from damage. In so doing, they might protect against the blood loss of menorrhagia.
Retinopathy
Refer to label instructions 1 star[1 star] Quercetin has been shown to inhibit aldose reductase, an enzyme that appears to contribute worsen diabetic retinopathy. Another flavonoid, rutin, may also improve retinopathy.
Varicose Veins
Refer to label instructions 1 star[1 star] Taking hydroxyethylrutoside may help reduce the size of varicose veins associated with pregnancy.

Copyright © 2019 Aisle7.

Learn more about Aisle7, the company.

Learn more about the authors of Aisle7 products.

The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications.

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