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PostPosted: Mon Oct 26, 2015 10:14 am 
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6 Health Benefits of Quercetin

Quercetin is an flavonoid (plant pigment) commonly found in fruits and vegetables, especially onions, citrus, and apples. Other sources include dark berries, grapes and olive oil. Green tea and red wine have also been pointed out as having notable amounts of quercetin.

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That’s all great. But, what does it do for us? Well, perhaps the primary benefit of quercetin is that it possesses potent antioxidants. Antioxidants fight against free radicals –- chemically reactive compounds that damage cell membranes and DNA and also cause cell death. In fact, many of the benefits you’ll often hear attributed to antioxidants refer to the the effects associated with quercetin. Let’s take a look at what some of them are.

1. Supports Normal Respiratory Health

When your respiratory system is irritated, redness and swelling can result from the release of histamines, and quercetin has been reported to have an antihistamine effect. Lab tests have shown quercetin influences intracellular enzymes and may help inhibit histamine release http://www.dreddyclinic.com/forum/viewtopic.php?f=11&t=33701. [1] This can often provide relief for watery eyes, runny nose, and swelling in the face.

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Another study compared the effectiveness of quercetin against contact dermatitis and photosensitivity, two conditions that do not respond well to a conventional approach. Researchers found that quercetin is effective at inhibiting redness and is easy to administer. What’s more, quercetin promoted significant improvement in both conditions. [2]

2. Supports Cardiovascular Health

Studies have shown that the consumption of flavonoids, specifically quercetin, offer a two fold benefit (at least) in promoting overall cardiovascular health http://www.dreddyclinic.com/forum/viewtopic.php?f=106&t=32685. First, it encourages blood flow http://www.dreddyclinic.com/forum/viewtopic.php?f=13&t=33649. [3] Secondly, researchers have observed that quercetin’s antioxidant action protects against LDL cholesterol oxidation. This may be beneficial because oxidation causes LDL cholesterol to stick to artery walls. [4]

3. Promotes Balanced Blood Pressure

In addition to supporting cardiovascular health, quercetin naturally promotes balanced blood pressure. A randomized, double-blind, placebo controlled, crossover study evaluated the effect of quercetin supplementation and reported that the participants experienced a stabilization in systolic, diastolic and average arterial pressure. [5]

Hematrex® is an herbal circulatory system support formula that promotes blood vessel strength and elasticity for healthy blood flow throughout the body.

4. Offers Protection Against Stress

When your body is stressed, it produces cortisol. Cortisol is a hormone that produces that “fight or flight” response. Although this is normal, when your stress levels are high and ongoing, cortisol can damage muscle tissue, leading to protein breakdown in the body. Quercetin can fight these effects during times of extended stress as it suppresses the enzyme necessary for cortisol release. [6]

5. Potential for Upper Respiratory Conditions?

Although the jury is still out, numerous animal studies and lab models have suggested that quercetin may offer a bronchial dilating http://www.dreddyclinic.com/forum/viewtopic.php?f=11&t=33688 effect. A 2013 study determined that it inhibited an enzyme that breaks down signaling proteins which produce swelling and airway narrowing. Quercetin caused a relaxation of the airway smooth muscle, leading researchers to suggest it may offer therapeutic solutions for persons suffering from upper respiratory conditions. [7] Hopefully more research will continue to explore this possibility.

Hematrex® is an herbal circulatory system support formula that promotes blood vessel strength and elasticity for healthy blood flow throughout the body.

6. Offers Nutritional Support for Overall Health

Listen, putting good nutrition http://www.dreddyclinic.com/forum/viewtopic.php?f=13&t=33848 into your body is one of the best measures you can take to encourage good health. It’s not a guarantee, and some people will still get sick, but it’s a good foundation and fundamental approach. Why should quercetin be part of your approach? Because research has shown that people who consume more fruits http://www.dreddyclinic.com/forum/viewtopic.php?f=21&t=33745 and vegetables have a lower risk of some diseases and lab studies have shown that quercetin has a positive benefit against some cancers. [8] [9] [10] [11] [12] Is it a cure? No. Is it something you should check into? I think so.

Supplementing With Quercetin

Although quercetin offers many benefits and it is all-natural, there are a few health considerations. Large amounts can stress the kidneys http://www.dreddyclinic.com/forum/viewtopic.php?f=64&t=33021, it may also interact with blood thinners, corticosteroids, and aspirin. If you’re taking any of these, it’s probably best to check with your healthcare provider before adding quercetin to the list — especially if you’re taking it in supplement form. Most people, however, should be able to enjoy dietary quercetin (fruits and vegetables) without a problem.

Do you take a quercetin supplement? How long has it been part of your regimen and what have you noticed? Please leave a comment below and share your experience with us!

by Dr. Edward Group DC, NP, DACBN, DCBCN, DABFM

References:

1. Chirumbolo S. The role of quercetin, flavonols and flavones in modulating inflammatory cell function http://www.ncbi.nlm.nih.gov/pubmed/20887269. Inflamm Allergy Drug Targets. 2010 Sep;9(4):263-85.

2. Weng Z, Zhang B, Asadi S, Sismanopoulos N, Butcher A, Fu X, Katsarou-Katsari A, Antoniou C, Theoharides TC. Quercetin is more effective than cromolyn in blocking human mast cell cytokine release and inhibits contact dermatitis and photosensitivity in humans http://www.ncbi.nlm.nih.gov/pubmed/22470478. PLoS One. 2012;7(3):e33805. doi: 10.1371/journal.pone.0033805. Epub 2012 Mar 28.

3. Perez-Vizcaino F, Duarte J. Flavonols and cardiovascular disease http://www.ncbi.nlm.nih.gov/pubmed/20837053. Mol Aspects Med. 2010 Dec;31(6):478-94. doi: 10.1016/j.mam.2010.09.002. Epub 2010 Sep 15.

4. Egert S, Bosy-Westphal A, Seiberl J, Kürbitz C, Settler U, Plachta-Danielzik S, Wagner AE, Frank J, Schrezenmeir J, Rimbach G, Wolffram S, Müller MJ. Quercetin reduces systolic blood pressure and plasma oxidised low-density lipoprotein concentrations in overweight subjects with a high-cardiovascular disease risk phenotype: a double-blinded, placebocontrolled cross-over study http://www.ncbi.nlm.nih.gov/pubmed/19402938. Br J Nutr. 2009 Oct;102(7):1065-74. doi: 10.1017/S0007114509359127. Epub 2009 Apr 30.

5. Edwards RL, Lyon T, Litwin SE, Rabovsky A, Symons JD, Jalili T. Quercetin reduces blood pressure in hypertensive subjects http://www.ncbi.nlm.nih.gov/pubmed/17951477. J Nutr. 2007 Nov;137(11):2405-11.

6. Cheng LC, Li LA. Flavonoids exhibit diverse effects on CYP11B1 expression and cortisol synthesis http://www.ncbi.nlm.nih.gov/pubmed/22172629. Toxicol Appl Pharmacol. 2012 Feb 1;258(3):343-50. doi: 10.1016/j.taap.2011.11.017. Epub 2011 Dec 8.

7. Townsend EA, Emala CW Sr. Quercetin acutely relaxes airway smooth muscle and potentiates-agonist induced relaxation via dual phosphodiesterase inhibition of PLC and PDE4 http://www.ncbi.nlm.nih.gov/pubmed/23873842. Am J Physiol Lung Cell Mol Physiol. 2013 Jul 19.

8. Long Q, Xiel Y, Huang Y, Wu Q, Zhang H, Xiong S, Liu Y, Chen L, Wei Y, Zhao X, Gong C. Induction of apoptosis and inhibition of angiogenesis by PEGylated liposomal quercetin in both cisplatin-sensitive and cisplatin-resistant ovarian cancers http://www.ncbi.nlm.nih.gov/pubmed/23858960. J Biomed Nanotechnol. 2013 Jun;9(6):965-75.

9. Wang G, Song L, Wang H, Xing N. Quercetin synergizes with 2-methoxyestradiol inhibiting cell growth and inducing apoptosis in human prostate cancer cells http://www.ncbi.nlm.nih.gov/pubmed/23673431. Oncol Rep. 2013 Jul;30(1):357-63. doi: 10.3892/or.2013.2469. Epub 2013 May 15.

10. Kim H, Seo EM, Sharma AR, Ganbold B, Park J, Sharma G, Kang YH, Song DK, Lee SS, Nam JS. Regulation of Wnt signaling activity for growth suppression induced by quercetin in 4T1 murine mammary cancer cells http://www.ncbi.nlm.nih.gov/pubmed/23900432. Int J Oncol. 2013 Oct;43(4):1319-25. doi: 10.3892/ijo.2013.2036. Epub 2013 Jul 23.

11. Del Follo-Martinez A, Banerjee N, Li X, Safe S, Mertens-Talcott S. Resveratrol and quercetin in combination have anticancer activity in colon cancer cells and repress oncogenic microRNA-27a http://www.ncbi.nlm.nih.gov/pubmed/23530649. Nutr Cancer. 2013;65(3):494-504. doi: 10.1080/01635581.2012.725194.

12. Hu Y, Wang S, Wu X, Zhang J, Chen R, Chen M, Wang Y. Chinese herbal medicine-derived compounds for cancer therapy: A focus on hepatocellular carcinoma http://www.ncbi.nlm.nih.gov/pubmed/23916858. J Ethnopharmacol. 2013 Aug 1. pii: S0378-8741(13)00531-X. doi: 10.1016/j.jep.2013.07.030.

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PostPosted: Wed Nov 04, 2015 10:32 am 
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