Flava'Choc raw cacao

Why flavanols matter

Cacao is one of the richest natural sources of flavanols. Most processing destroys them.

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What are Flavanols?

Flavanols are part of the polyphenol family: naturally occurring bioactive compounds known for their antioxidant properties.

They occur in foods like green tea, apples, and blueberries, but cacao stands out as one of the richest natural sources.

Decades of research have examined the relationship between flavanol intake and a range of physiological outcomes: from vascular function and blood flow to cognitive performance and gut microbiota. Cacao stands out as one of the richest dietary sources of flavanols, provided it is not heavily processed.

What research tells us about cacao flavanols

Heart Health & Blood Flow

Cocoa flavanols contribute to maintaining vascular elasticity and normal blood flow, the only EU-authorised health claim for cacao.

Cognitive function

Clinical research, including the large-scale COSMOS-Mind trial, has linked higher flavanol intake to measurable changes in cerebral blood flow and memory performance.

Cellular Health

Cacao's polyphenol spectrum is among the most extensively studied in nutritional science, with active research into oxidative stress markers, inflammatory pathways, and cellular aging processes.

Metabolic Support

Emerging research has examined links between regular flavanol intake and metabolic markers, including insulin sensitivity, glucose regulation, and energy metabolism.

Gut & Microbiome Health

Cacao polyphenols interact with gut microbiota in ways researchers are actively investigating, with multiple studies reporting effects on microbiome diversity and composition.

Skin Health

Studies have investigated associations between flavanol intake and skin parameters, including hydration, elasticity, and response to UV exposure.

Scientifically Recognized for Heart Health

Cacao is one of the few foods with an officially EU-authorised health claim:

"Cocoa flavanols contribute to maintaining the elasticity of blood vessels, which contributes to normal blood flow."
— EU Regulation 851/2013

This effect is achieved at a daily intake of 200 mg of cocoa flavanols, the threshold established through clinical research and recognised by the European Commission.

Blood pressure

In multiple large-scale reviews of clinical trials, participants who consumed flavanol-rich cacao showed average blood pressure reductions of around 3–5 mmHg systolic and 2–3 mmHg diastolic compared to control groups, with stronger effects in people with elevated blood pressure (Ried et al., 2017; Hooper et al., 2012).

Endothelial function

Researchers often measure vascular health using a test called flow-mediated dilation (FMD), essentially how well an artery widens in response to increased blood flow, a direct indicator of blood vessel health. In flavanol intervention studies, FMD improvements of up to 30% have been observed in participants consuming high-flavanol cacao (Schroeter et al., 2006; Heiss et al., 2010).

The COSMOS Trial (Cocoa Supplement and Multivitamin Outcomes Study)

The COSMOS trial is the largest randomised study on cocoa flavanols to date: 21,442 participants, followed over 3.6 years. Participants who received 500 mg of cocoa flavanols daily had a 27% lower rate of cardiovascular mortality compared to the placebo group (Sesso et al., 2022).

In a sub-study of COSMOS, researchers focused specifically on participants with a low-flavanol diet, the group most likely to show a measurable response. After one year of 500 mg daily, this group showed a 16% improvement on standardised memory tests compared to placebo (Brickman et al., 2023).

Full study references and methodology → The Science Behind Flava'Choc: Our Complete Reference List

Minimal vs Optimal Intake

The EU-authorised health claim for cocoa flavanols is based on 200 mg per day, the minimum dose established by EFSA for normal blood vessel elasticity and blood flow.

However, the most recent large-scale trials, including COSMOS, used 500 to 750 mg daily. At these higher levels, researchers observed stronger associations across multiple outcomes:

  • More pronounced effects on blood pressure and vascular flexibility (Ried et al., 2017; Hooper et al., 2012)
  • Greater improvements in endothelial function (Heiss et al., 2010)
  • Measurable effects on memory performance (Brickman et al., 2023)
  • 27% lower cardiovascular mortality in the COSMOS main trial (Sesso et al., 2022)

Reaching 500 mg through conventionally processed chocolate is practically impossible. Roasting, alkalisation, and industrial refining destroy the majority of flavanols originally present in the cacao bean, a standard 70% dark chocolate bar typically delivers no more than 20 to 50 mg per serving.

Flava'Choc publishes batch-specific flavanol measurements for each product, allowing you to calculate your actual daily intake.

Daily flavanol intake: Minimal vs. Optimal

800 600 400 200 0
~100 mg
200 mg
750 mg
Typical Dark Chocolate
EFSA Minimum
Optimal Intake (Flava'Choc)

More Than Flavanols: The Full Functional Spectrum of Cacao

Cacao's strength goes beyond flavanols. Raw cacao contains a remarkably diverse spectrum of bioactive compounds — each extensively studied in nutritional science.

CORE POLYPHENOLS

Flavanols

The most extensively studied polyphenols in cacao, with the largest body of clinical research on vascular and cognitive outcomes.

POLYPHENOLS

Flavonols & Flavones

A related polyphenol family found alongside flavanols in cacao, actively studied for their role in vascular and cellular processes.

PIGMENT COMPOUNDS

Anthocyanins

The natural pigments behind cacao's deep colour, and among the most studied polyphenols in nutritional science, with ongoing research into cellular effects.

POLYPHENOLS (PACs)

Proanthocyanidins

Large, complex polyphenol structures in cacao that reach the gut microbiota largely intact, actively studied for their effects on microbiome composition and gut health.

BIOACTIVE COMPOUNDS

Theobromine & Caffeine

Cacao's natural stimulants. Theobromine delivers a slower, milder effect than caffeine, both extensively studied for their effects on alertness and vascular tone.

MINERALS

Essential minerals

Cacao is naturally rich in magnesium, copper, iron, and potassium. For each of these minerals, the EU recognises authorised health claims, from energy metabolism to oxygen transport and nervous system function.

Want to learn even more?

Check out our blog to learn how flavanols fit into the broader polyphenol category and explore a full list of references.
Why We Don't Use the Term "Ceremonial Cacao"

Why We Don't Use the Term "Ceremonial Cacao"

"Ceremonial grade" has no regulated definition. Here's why we test and publish flavanol content instead.
Flavanols vs. Flavonoids vs. Polyphenols: What's the Difference?

Flavanols vs. Flavonoids vs. Polyphenols: What's the Difference?

Polyphenols, flavonoids, flavanols, flavonols — what's actually the difference, and why it matters for cacao.
Cacao Flavanols and Cerebral Blood Flow: What the Research Shows

Cacao Flavanols and Cerebral Blood Flow: What the Research Shows

How cacao flavanols affect cerebral blood flow and cognition, from acute lab studies to multi-year trials.