Activate Now
ProHealth health Vitamin and Natural Supplement Store and Health
Home  |  Log In  |  My Account  |  View Cart  View Your ProHealth Vitamin and Supplement Shopping Cart
800-366-6056  |  Contact Us  |  Help
Facebook Google Plus
Fibromyalgia  Chronic Fatigue Syndrome & M.E.  Lyme Disease  Natural Wellness  Supplement News  Forums  Our Story
Store     Brands   |   A-Z Index   |   Best Sellers   |   New Products   |   Deals & Specials   |   Under $10   |   SmartSavings Club

Trending News

'Healthy' Foods Differ by Individual

Surprising Benefits of Cinnamon

Specific vitamin D levels linked to heart problems

A Sleep Intervention For Children With Autism: A Pilot Study

Higher vitamin D levels may be protective against acute rhinosinusitis

Basic Vitamin A Primer

Curcumin: The All In One Solution

Coconut oil can control overgrowth of a fungal pathogen in GI tract, study in mice suggests

Pilot Study: Measuring Relaxation Response to the iLs Dreampad

Researchers are on their way to predicting what side effects you'll experience from a drug

Print Page
Email Article

Quercetin—The Anti-Allergy Bioflavonoid

  [ 68 votes ]   [ 1 Comment ]
By Source:Lets Live Magazine • • October 1, 1992

Every spring, summer and fall millions of Americans sneeze, wheeze, drip, and sniffle their way through a world filled with trillions of airborne pollen, dust, and smoke particles. Over-the-counter anti-allergy drugs (antihistamines) tend to leave their users either sleepy or over-stimulated. Fortunately, modern nutritional science now offers a highly effective, natural and nontoxic remedy for allergies: the bioflavonoid quercetin.

Quercetin, a "cousin" of the more well-known bioflavonoid rutin, is one of a thousand or so members of the bioflavonoid family. This is a group of coloring pigments widely found throughout the plant kingdom, where they also provide plants with antioxidant protection against environmental stresses. Natural diets high in vegetables, fruit, sprouts, and whole grains typically provide a total of 1,000 to 2,000 mg. a day of a broad range of flavonoids. Blue-green algae are the usual source of quercetin, but it's also available as a food supplement.

Allergies and asthma are inflammatory conditions usually triggered by air- or food-borne pollens and chemicals called "allergens." After these allergens are absorbed into the blood (through the lungs, skin, or intestines), they cause the B cells (white blood cells) of allergy-sufferers to produce billions of molecules of the allergic antibody IgE. The IgE molecules then travel through the bloodstream until they combine to with mast cells or basophils. Mast cells (which line many blood vessels) and basophils (a type of white blood cell circulating in the bloodstream) are the main storage sites for histamine and serotonin. The IgE allergic antibody then causes the cell membranes of the mast cells/basophils to become "leaky, " allowing their storage load of histamine and serotonin to pour into the surrounding blood and tissues. The IgE-released histamine and serotonin then produce the familiar allergic symptoms of runny, swollen nose; blocked sinuses; itchy eyes; skin blotches; coughing and wheezing; etc.

Quercetin to the rescue! Quercetin has a strong affinity for mast cells and basophils. It tends to stabilize their cell membranes, preventing them from spilling their pro-inflammatory, allergy-symptom-causing load of histamine/serotonin into the surrounding blood and tissue in response to the IgE antibody. And without the release of these potent inflammatory mediators, the familiar misery of allergies simply will not occur, even though you've inhaled the pollen, animal hair, or whatever normally triggers allergy attacks.

Asthma is an allergic inflammation involving the lungs. During an asthma attack (which can be triggered by air- or food-borne pollen, dust, animal hair, chemicals, etc.), the millions of tiny air sacs within the lungs are constricted, seriously impairing breathing and causing a feeling of tightness in the chest. In addition to IgE-released histamine, the primary biochemical cause of the asthmatic symptoms is a group of fatty acid derivatives called leukotrienes (LTs). These asthma-causing LTs are made from arachidonic acid (a key fatty acid constituent of many cell membranes) by the action of two enzymes - phospholipase A2 and lipoxygenase. Quercetin is known to be a powerful inhibitor of both these enzymes. Thus it prevents the formation of asthma-causing LTs, even when the IgE antibody (formed in response to inhaled or swallowed allergens) is present in the lungs to stimulate LT Production and release. Since quercetin suppresses the release and/or production of the two primary inflammatory mediators–histamine and leukotrienes–that cause the actual symptoms of asthma, its potential benefit in the prevention and treatment of asthma is evident.

Quercetin is a safe, nontoxic substance. A report by I. Hirono et al in Cancer Letters (1981), for example, found no evidence of toxicity or carcinogenicity in rats, even when quercetin made up 10 percent of their total dietary intake.

Unfortunately, quercetin is barely soluble in water, so poor dietary absorption may limit its efficacy. Because of this, Murray, N.D., has suggested that quercetin be taken in combination with bromelain to improve its absorption. Bromelain is a natural, protein-digesting enzyme derived from pineapples. It has been used "to increase absorption of compounds, including antibiotics. Also, bromelain has powerful anti-inflammatory properties that synergize with quercetin. Bromelain inhibits several other common inflammatory mediators, including bradykinin and fibrin. It's widely used in sports medicine to reduce the pain and swelling of bruises, sprains, muscle tears, etc., for this reason.

As a clinical nutritionist I have had numerous occasions to use quercetin on allergy and asthma suffers. About 1,000 to 2,000 mg. a day, divided into three to six doses, is sufficient to control most cases of allergy and many cases of asthma. I have remained virtually allergy and asthma free for several years through daily use of quercetin, and finding it much more effective for this purpose than other bioflavonoids.

Lets Live Magazine, September, 1992

Post a Comment

Featured Products From the ProHealth Store
Ultra EPA  - Fish Oil Ultra ATP+, Double Strength Mitochondria Ignite™ with NT Factor®

Looking for Vitamins, Herbs and Supplements?
Search the ProHealth Store for Hundreds of Natural Health Products

Article Comments Post a Comment

Asthma woes!
Posted by: kimmers68
Dec 2, 2008
i cannot escape my inhaler! seriously, i woke myself up at 4 this morning trying to breath!! scary! i just read up on Quercetin... i have used it numerous times for allergy issues, but not larger dosing for asthma issues. you may or may not believe in prayer, but i have been praying for days for an answer that would not put me on daily asthmas meds (long term) - so i am going after work today for Quercetin and i wanted to know since i am in full flare up mode how much would you suggest to take and how to taper off for maintenance. also, are there foods to seriously avoid so as to not promote more mucous?? any help or suggestions would be appreciated. (please answer this as if I were your daughter or favorite niece- i really need a solution that won't damage me in the process) thank you - Kim Spiegel
Reply Reply
Free Chronic Fatigue Syndrome and Fibromyalgia Newsletters
Subscribe to
Subscribe Now!
Receive up-to-date ME/CFS, Fibromyalgia & Lyme Disease treatment and research news
 Privacy Guaranteed  |  View Archives

Repair Damaged Mitochondria and Reduce Fatigue Up to 45%

Featured Products

Quercetin / Bromelain Complex Quercetin / Bromelain Complex
Balances Histamine Levels Naturally
FibroSleep™ FibroSleep™
The All-in-One Natural Sleep Aid
Ultra EPA  - Fish Oil Ultra EPA - Fish Oil
Ultra concentrated source of essential fish oils
Ultra ATP+, Double Strength Ultra ATP+, Double Strength
Get energized with malic acid & magnesium
Optimized Curcumin Longvida® Optimized Curcumin Longvida®
Supports Cognition, Memory & Overall Health

Natural Remedies

Coping When Colds or Flu Catch Up with You Coping When Colds or Flu Catch Up with You
Sunshine Vitamin Has D-lightful Health Benefits Sunshine Vitamin Has D-lightful Health Benefits
Astaxanthin - A Little-Known but Power-Packed Nutrient Astaxanthin - A Little-Known but Power-Packed Nutrient
Stop Bacteria With Nature's Antibiotics Stop Bacteria With Nature's Antibiotics
Live Without Anxiety or Stress

What is Fibromyalgia?
Fibromyalgia Diagnosis
Fibromyalgia Symptoms
Fibromyalgia Causes
Fibromyalgia Treatments
Fibromyalgia Diet
Fibromyalgia Medications
M.E. & CFS
What is M.E./CFS?
M.E./CFS Diagnosis
M.E./CFS Symptoms
M.E./CFS Causes
M.E./CFS Treatments
M.E./CFS Diet
M.E./CFS Medications
What is Lyme Disease?
Lyme Disease Diagnosis
Lyme Disease Symptoms
Lyme Disease Causes
Lyme Disease Treatments
Lyme Disease Diet
Lyme Disease Medications
M.E. & CFS
Lyme Disease
General Health
ProHealth on Facebook  ProHealth on Twitter  ProHealth on Pinterest  ProHealth on Google Plus
Credit Card Processing