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Love Your Heart


What to Know about Flavonoids

You may have heard of the buzzword ‘antioxidants’ and how they are beneficial to our bodies. However, ‘flavonoids’ (pronounced as fla-vuh-noydz), is the key word and dietary component to remember when it comes to tea! Flavonoids are naturally occurring dietary components found in a variety of plant-based foods and beverages such as tea, cocoa, fruits and vegetables, that are responsible for the color and flavor in tea, and have been associated with heart health benefits.1,2,3,4 Flavan-3-ols are a sub-group of flavonoids and are the predominate flavonoids found in tea.

Flavanoids Chart

Where can I find Flavonoids?


Although the total amount of flavonoids can vary depending on the food or beverage, tea is one of the best sources of flavonoids in the diet!5 Check out how green and black tea stack up versus other foods and beverages and why unsweetened tea is the ideal choice to help support a healthy heart!

Daily consumption of tea

What Amount of Flavonoids are Beneficial?


  • Based on current recommendations from scientific experts, daily consumption of 400-600mg of flavan-3-ols, a sub-group of flavonoids can help maintain  a healthy heart as part of a diet consistent with the USDA’s Dietary Guidelines.6   
  • Scientific evidence has found flavonoids from unsweetened green or black tea can help support healthy blood circulation.7-9


1. Greyling, A.; Ras, R.T.; Zock, P.L.; Lorenz, M.; Hopman, M.T.; Thijssen, D.H.J.; Draijer, R. The effect of black tea on blood pressure: A systematic review with meta-analysis of randomized controlled trials. PLoS ONE 2014, 9, e103247
2. Kim, K.; Vance, T.M.; Chun, O.K. Greater flavonoid intake is associated with improved CVD risk factors in US adults. Br. J. Nutr. 2016, 115, 1481–1488 © 2020 Unilever
3. McKay, D.L.; Blumberg, J.B. The role of tea in human health: An Update. J. Am. Coll. Nutr. 2002, 21, 1–13.
4. Abby Keller & Taylor C. Wallace (2021) Tea intake and cardiovascular disease: an umbrella review, Annals of Medicine, 53:1, 929-944, DOI: 10.1080/07853890.2021.1933164.
5. Vieux F, Maillot M, Rehm CD, Drewnowski A. Flavonoid Intakes in the US Diet Are Linked to Higher Socioeconomic Status and to Tea Consumption: Analyses of NHANES 2011-16 Data. J Nutr. 2020 Aug 1;150(8):2147-2155.doi: 10.101093/jn/nxaa145. PMID:32470977.
6. Kristi M Crowe-White, Levi W Evans, Gunter G C Kuhnle, Dragan Milenkovic, Kim Stote, Taylor Wallace, Deepa Handu, Katelyn E Senkus, Flavan-3-ols and Cardiometabolic Health: a Guideline Recommendation by the Academy of Nutrition and Dietetics, Advances in Nutrition, 2022;, nmac105,
7. Ras RT, Zock PL, Draijer R.. Tea consumption enhances endothelial-dependent vasodilation; a meta-analysis. PLoS One. 2011;6(3):e16974.
8. Grassie et al. 2016. Black Tea Increases Circulating Endothelial Progenitor Cells and Improves Flow Mediated Dilatation Counteracting Deleterious Effects from a Fat Load in Hypertensive Patients: A Randomized Controlled Study. Nutrients. 8(11), 727
9.  Schreuder THA, Eijsvogels TMH, Greyling A, et al. . Effect of black tea consumption on brachial artery flow-mediated dilation and ischaemia–reperfusion in humans. Appl Physiol Nutr Metab. 2014;39(2):145–151.