Polyphenols: plant compounds that act as powerful antioxidants

Polyphenols are plant compounds found in fruits, vegetables, tea, coffee, cocoa, and legumes. They protect cells from damage, lower chronic inflammation, and reduce risk of major diseases.

1,000 to 1,500 mg a day

That is the range where large population studies begin to see lower risk of cardiovascular disease, diabetes, cognitive decline, and frailty.23 Measured intake across US and European populations runs 600 to 900 mg a day, and varies with diet quality.1

Intake ranges, by population

Population Intake Notes
Mean intake, US and Europe 600 to 900 mg/day From mixed whole foods. Varies by diet quality.1
Range linked to lower risk 1,000 to 1,500 mg/day Higher intakes in this range were linked to lower risk of cardiovascular disease, diabetes, cognitive decline, and frailty.23
Highest-intake populations 1,500 to 1,800 mg/day Recorded in Polish, Danish, and Japanese groups, where coffee and tea contribute more.4

Figures like these move depending on how intake is measured and which food database is used. One 2024 study of 9,008 UK adults, using week-long food diaries, put the middle of the range at 1,536 mg a day.10

Which foods carry them

Polyphenols are concentrated in deeply pigmented fruits, in green tea, in herbs and spices, and in leafy greens. Berries carry anthocyanins. Green tea carries catechins. Turmeric carries curcuminoids. Coffee, cocoa, olive oil, red wine, nuts, and legumes all contribute.

Intake is a matter of frequency more than of any single food. A diet reaching the upper ranges above contains several polyphenol-dense foods every day rather than one of them occasionally.

Polyphenol-dense foods in Field Theory

  • Aronia berry
  • Wild blueberry
  • Matcha
  • Kale
  • Spinach
  • Broccoli
  • Cranberry
  • Turmeric
  • Black pepper

Aronia, also called chokeberry, is among the most polyphenol-dense fruits grown in North America and is rarely eaten outside of juice and jam.

What polyphenols do

Polyphenols are studied for their antioxidant and anti-inflammatory effects and for the signals they send inside cells. What follows is what has been observed in the studies cited.

System Observed effects
Cardiovascular Better function in the lining of blood vessels, lower blood pressure, and less oxidation of LDL cholesterol.5
Cognitive Protection of neurons, better blood flow to the brain, and support for memory and focus.69
Metabolic Effects on insulin sensitivity and on how the body handles glucose.7
Immune and inflammatory In 9,008 UK adults, those eating more polyphenols had lower levels of two markers of inflammation in the blood, C-reactive protein and fibrinogen, and the more they ate the lower the levels ran.10

These findings are covered in more detail on the Mediterranean diet and heart health page, the soluble fiber and cholesterol page, and the diet and brain health page.

Why the food matters, not only the milligrams

How much of a polyphenol the body actually absorbs varies widely from one compound to the next, and depends on what it arrives with. The fats and fibers in the same meal change it. So does the gut microbiome, which converts many polyphenols into the forms that end up circulating in the blood.8

That is the limit of any milligram figure. It describes what is in the food, not what gets absorbed, and the gap between the two changes with the compound and the meal.

It is also why polyphenols are hard to isolate into supplements. In the studies above, intake was measured as diet: whole foods eaten in combination, with the fibers and fats that come with them.

What's in Field Theory

Field Theory Complete Nutrition Shake is a meal made from 27 whole foods. Per serving:

1,005 mg Polyphenols
1,650 mg Omega-3 ALA
11 g Fiber
26 g Protein

The polyphenols come from aronia, wild blueberry, matcha, leafy greens, turmeric, and black pepper, alongside the fibers and seed fats present in the same meal. Measured intake across US and European populations runs 600 to 900 mg a day. One Field Theory serving is 1,005 mg.

See the product

References

  1. Pérez-Jiménez J, Fezeu L, Touvier M, et al. Dietary intake of 337 polyphenols in French adults. American Journal of Clinical Nutrition. 2011;93(6):1220-1228. doi:10.3945/ajcn.110.007096
  2. Grosso G. Effects of polyphenol-rich foods on human health. Nutrients. 2018;10(8):1089. doi:10.3390/nu10081089
  3. Tresserra-Rimbau A, Medina-Remón A, Pérez-Jiménez J, et al. Dietary intake and major food sources of polyphenols in a Spanish population at high cardiovascular risk: the PREDIMED study. Nutrition, Metabolism and Cardiovascular Diseases. 2013;23(10):953-959. doi:10.1016/j.numecd.2012.10.008
  4. Del Bo' C, Bernardi S, Marino M, et al. Systematic review on polyphenol intake and health outcomes: is there sufficient evidence to define a health-promoting polyphenol-rich dietary pattern? Nutrients. 2019;11(6):1355. doi:10.3390/nu11061355
  5. Tresserra-Rimbau A, Rimm EB, Medina-Remón A, et al. Polyphenol intake and mortality risk: a re-analysis of the PREDIMED trial. BMC Medicine. 2014;12:77. doi:10.1186/1741-7015-12-77
  6. Letenneur L, Proust-Lima C, Le Gouge A, Dartigues JF, Barberger-Gateau P. Flavonoid intake and cognitive decline over a 10-year period. American Journal of Epidemiology. 2007;165(12):1364-1371. doi:10.1093/aje/kwm036
  7. Hanhineva K, Törrönen R, Bondia-Pons I, et al. Impact of dietary polyphenols on carbohydrate metabolism. International Journal of Molecular Sciences. 2010;11(4):1365-1402. doi:10.3390/ijms11041365
  8. Manach C, Scalbert A, Morand C, Rémésy C, Jiménez L. Polyphenols: food sources and bioavailability. American Journal of Clinical Nutrition. 2004;79(5):727-747. doi:10.1093/ajcn/79.5.727
  9. Rendeiro C, Rhodes JS, Spencer JPE. The mechanisms of action of flavonoids in the brain: direct versus indirect effects. Neurochemistry International. 2015;89:126-139.
  10. Dryer-Beers ER, Griffin J, Matthews PM, Frost GS. Higher dietary polyphenol intake is associated with lower blood inflammatory markers. Journal of Nutrition. 2024;154(8):2470-2480.

The full formulation rationale, with all nineteen references, is in the Field Theory Clinician's Guide.