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  • Flavonoid refers to any large group of plant substances that include the anthocyanins. Anthocyans are water-soluble pigments that are responsible for colors found in different plants. 
  • Anthocyans can range from violet and blue to most shades of red. They can also be found in tea and red wine and function in the body as antioxidants that invade cancer cells and interrupt cell growth. 
  • Flavonoids are also commonly referred to as bioflavonoids in the media. 
  • The major flavonoids found in citrus fruits are diosmin, hesperidin, rutin, naringin, tangeretin, diosmetin, narirutin, neohesperidin, nobiletin, and quercetin.
  • The basic flavonoid structure allows a multitude of variations in chemical structure, giving rise to flavonols (quercetin, kaempherol, myricetin), flavones (apigenin, luteolin), flavanones (catechin, epicatechin), anthocyanidins and isoflavonoids (genistein, daidzein). 
  • The flavonoids occur in fruits, vegetables, nuts, seeds, flowers, leaves, bark, tea and wine. The function of polyphenols in plants are antioxidants (protection from UV light), protection form insects, fungi, viruses and bacteria, visual attention- pollinator attraction, feed repellent and plant hormone controllers. 
  • Flavonoids, especially quercetin extracted from T. catappa can be added to food products.Quercetin is considerably stable in lipid systems, stored at low temperatures and protected from light. 
  • Due to their activity as antioxidants, flavonoids found in botanical dietary supplements may play a role in the prevention of heart disease and cancer. 
  • Flavonoids are widely distributed in plants fulfilling many functions including producing yellow or red/blue pigmentation in flowers and protection from attack by microbes and insects. 
  • Consumers and food manufacturers have become interested in flavonoids for their medicinal properties, especially their potential role in the prevention of cancers and cardiovascular disease. The beneficial effects of fruit, vegetables, and tea or even red wine have been attributed to flavonoid compounds rather than to known nutrients and vitamins.
  • Flavonoids are reported to have numerous health benefits. They are the natural pigments in fruits and vegetables.
  • Flavonoids aid circulation, lower cholesterol and prevent and treat cataracts. Hemorrhoids are reduced using flavonoids.Flavone and quercetin collectively reduced DNA oxidation.
  • Citrus flavonoids like hesperidin and rutin, taken with at least 1000 mg of Vitamin C, are also effective in relieving menopausal symptoms such as hot flashes. 
  • The Agricultural Research Service (ARS) under the U.S. Department of Agriculture (USDA) estimates U.S. flavonoid consumption is between 23 mg/d and 1,000 mg/d.
  • Basic Information
  • Flavonoids- Introduction
  • A Critical Look at the Flavonoids
  • Bioflavonoids
  • Flavonoids and Health
  • General structures of flavonoids and anthocyanins
  • Functions Of Flavonoids
  • USDA Database for the Flavonoid
  • Citrus Flavonoids as Bioactive Compounds

Sources Of Flavonoids

  • Vitamins & health supplements guide
  • Berries found to be a good source of flavonoids
  • The Color of Health
  • Flavonoids and phenolics: a strong tradition of Mediterranean diet
  • Effects on endothelial function and blood pressure
  • Common Dietary Flavonoids


  • Metabolism And Lipid Peroxidation
  • Analyses for Flavonoid Aglycones in Fresh and Preserved Hibiscus Flowers
  • Flavonoid production in plant tissue cultures
  • Flavonoid Biosynthesis in Bilberry
  • Flavonoids- Manufacturing
  • Extraction Of Mulberry Flavonoids For Industrial And Pharmaceutical Uses
  • Optimal Process to Extract Flavonoids from Red-raspberry Fruits
  • Optimization of conditions for supercritical fluid extraction of flavonoids from hops
  • Flavonoid and carotenoid extraction and stability from Terminalia catappa leaves


  • Antioxidants and Stroke Prevention Management
  • Giardiasis: Pathophysiology and Management
  • Perimenopause: Nutritional Management
  • Prevention and Management of Prostate Cancer Using PC-SPES

Company Profiles

  • Bio AtlanTech
  • Aquapharm Bio-Discovery Ltd
  • China Technology Development Group Corporation
  • Frontier Natural Products Co-op
  • Indofine Chemical Company, Inc
  • Toroma Organics Ltd


  • Natural Health Consultants- Cocoa Flavonoids
  • Consultant Pharmacist
  • John M. Miller, Ph.D., Botanist
  • Kathleen A.Robson
  • Marketing & Strategy Consultants
  • Oncology Consultants


  • RP-HPLC analysis of phenolic compounds and Flavonoids in beverages
  • Mis-identification of the Major Antioxidant Flavonoids in Young Barley Leaves
  • Complex Technology on Products of German chamomile
  • Effect of Flavonoids Morin
  • Grapefruit falvonoid may repair DNA, protect against cancer
  • Lipid Technology
  • Novogen Isoflavonoid Technology

Material Safety Data Sheet and Product Information

  • Bamboo-leaf-flavonoids Powder
  • Bioflavonoids C Solgar Vitamin
  • Ester-C
  • Flavonoids Group
  • Isoflavonoids
Biological Activities Of Flavonoids
  • Antimicrobial Activity Of Bioactive Component
  • Flavonoids from flowers of Cephalaria pastricensis and their antiradical activity
  • Absorption of kaempferol from endive
  • Epicatechin in Human Plasma
  • Effect of plasma metabolites of (+)-catechin and quercetin
  • Molecular imaging of the biological effects of quercetin and quercetin-rich foods

Health Benefits And Applications

  • Onion flavonoids: Functional compounds for health benefit
  • Flavonoids: Benefits
  • Health benefits of Cocoa Flavonoids
  • Health Benefits of Citrus Flavonoids
  • Health Benefits of Green Tea
  • Flavonoids in Diet
  • Flavonoid Protects DNA from Oxidative Damage
  • Antioxidant Appeal of Flavonoids
  • Effects of the flavonoids quercetin and apigenin on hemostasis
  • Effect of Processing on Flavonoids in Millet flour


  • An Integrated Approach to Funtional Genomics and Bioinformatics in a Model Legume
  • CWSF Project
  • Neem Project
  • Testing of chemopreventive potential of flavonoid Phytochemicals
  • Induction Of Pathogen Resistance in Fruit Trees
  • Molecular and Genetic Characterization of the SARS Coronavirus Auxilliary Protein X1 in Drosophila

United States Patent

  • Drynaria Extractions for treating Osteoporosis And Their Extraction Process
  • Extraction, Purification And Conversion Of Flavonoids From Plant Biomass
  • Extraction Of Flavonoids
  • Method for extraction of proanthocyanidins from plant material
  • Method For Obtaining An Extract or Ginkgo Biloba Leaves
  • Process For the Supercritical Extraction And Separation Of Solid Samples
  • Process For Isolating Saponins And Flavonoids From leguminous Plants


  • International Cocoa Organization Annual Report
  • Finessing The Flavonoids
  • Toxicology And Carcinogenesis 
  • Generation of High Quality Australian Skullcap Products
  • Antioxidant Activities of Flavonoids

Suppliers And Buyers Of Flavonoids

  • Arbonova
  • Citrous Bioflavonoids - US Suppliers
  • Flavone Manufacturers
  • Flavonoids Suppliers
  • Industrial Flavonoids Suppliers
  • Flavonoids Selling Leads
  • Flavonoids Suppliers Directory
  • Manufacturers: Flavonoids
  • Flavonoids Buyers

Quercetin Suppliers

  • GNC LiveWell
  • iHerb.com
  • LifeExtension
  • Suppliers Directory
  • Quercetin Price Lists
  • Drugstore
  • Quercetin Complex Suppliers

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