different between quercitin vs quercetin

English

Etymology

From Latin querc?tum (“oak plantation”) +? -in.

Pronunciation

• IPA^(key): /?kw??s?t?n/

Noun

quercitin (uncountable)

1. (organic chemistry) A flavonoid found in fruits, vegetables, leaves and grains.
   • 2002, D. G. Lindsay, 7: Nutritional enhancement of plant foods, Victoriano Valpuesta (editor), Fruit and Vegetable Biotechnology, page 174,

     Quercitin-?-glucoside is more easily absorbed than the aglycone quercitin. Isorhamnetin-?-glucoside, which is chemically similar to quercitin, differing only by a single methoxyl group, is more readily absorbed.

   • 2004, Willem Serfontein, Did Your Doctor Tell You?, page 17,

     Here again the consumption of a bioflavonoid (quercitin) was related to the incidence of CAD mortality. It was found that men who consumed (from the diet) less than 10 mg per day of quercitin had a 200% increase in the CAD death rate, compared to those who consumed more than 30 mg.

   • 2014, George Aiken, 2: Fluorescence and Dissolved Organic Matter: A Chemist's Perspective, Paula Coble, Jamie Lead, Andy Baker, Darren Reynolds, Robert G. M. Spencer (editors), Aquatic Organic Matter Fluorescence, page 48,

     In the case of the flavanol quercitin, the absorption spectrum of quercitin itself was red-shifted and its fluorescence intensity increased, while the fluorescence intensity of albumin was quenched.

Synonyms

• (flavonoid): meletin

English

Etymology

translingual Quercus (“genus of oak”)

Noun

quercetin (countable and uncountable, plural quercetins)

1. (organic chemistry, biochemistry) A flavonol found in many fruits, vegetables, leaves and grains.
   • 2003, David Hoffmann, Medical Herbalism: The Science and Practice of Herbal Medicine, page 104,

     Quercetin has gained the attention of the supplement industry, and is now widely promoted as a natural anti-inflammatory and antioxidant magic bullet.

   • 2005, James Braly, Patrick Holford, Hidden Food Allergies, page 101,

     The one daily supplement that often reduces allergic symptoms across the board is the phytonutrient quercetin, a chemical compound known as a bioflavonoid and found in plants.

   • 2014, Masuko Kobori, 14: Dietary Quercetin and other Polyphenols: Attenuation of Obesity, Ronald Ross Watson, Victor R. Preedy, Sherma Zibadi (editors), Polyphenols in Human Health and Disease, Volume 1, page 168,

     In plasma, quercetin mostly exists as glucuronated, sulfated, and/or methylated quercetin conjugates.

   • 2015 August 1, Marta Zaraska, Bitter truth, in New Scientist, Issue 3032, page 27,

     One study, for example, found that eating a diet rich in quercetin, found in green tea, broccoli and red wine, might help protect against lung cancer, especially in heavy smokers.

Hypernyms

• flavonol

Derived terms

Translations