Flavonoids (pronounced as fla-vuh-noydz) are special substances (also called bioactives) found naturally in tea that can help support health. In fact, tea is one of the top sources of flavonoids in the diet and can be a convenient way to help support a healthy heart with two cups every day.1,2,3,4,5
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
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
McKay, D.L.; Blumberg, J.B. The role of tea in human health: An Update. J. Am. Coll. Nutr. 2002, 21, 1–13.
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.
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.
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 Cardio metabolic Health: a Guideline Recommendation by the Academy of Nutrition and Dietetics, Advances in Nutrition, 2022;, nmac105, https://doi.org/10.1093/advances/nmac105
Ras RT, Zock PL, Draijer R.. Tea consumption enhances endothelial-dependent vasodilation; a meta-analysis. PLoS One. 2011;6(3):e16974.
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
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.
