Grape Seed Polyphenols in Cardiovascular and Metabolic Health

Grape seed polyphenols constitute a complex mixture of flavonoids—chiefly proanthocyanidins, catechins and gallic acid derivatives—that exert potent antioxidant, anti-inflammatory and vasodilatory effects. In cardiovascular systems, these compounds enhance endothelial function by upregulating nitric oxide production, reducing oxidative damage to vascular cells and modulating lipid profiles through inhibition of cholesterol esterase and bile acid binding. Metabolically, grape seed polyphenols improve insulin sensitivity, attenuate hepatic lipogenesis and promote fatty acid β-oxidation via activation of key regulators such as AMP-activated protein kinase (AMPK). The interplay between these bioactives and the gut microbiota generates metabolites that reinforce intestinal barrier integrity, regulate nutrient absorption and influence systemic inflammation. Globally, grape seed extracts are being developed as nutraceuticals and functional food ingredients, offering a sustainable route to valorise winemaking by-products while addressing cardiometabolic disease burdens. A balance of preclinical mechanistic studies and emerging clinical trials underscores their translational potential, with formulation strategies and varietal composition critical to optimise bioavailability and efficacy.

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Grape Seed Polyphenols in Cardiovascular and Metabolic Health publication trend

The graph below shows the total number of articles in grape seed polyphenols in cardiovascular and metabolic health across all publications each year (not limited to Nature Index journals).

Technical terms

Polyphenols: plant-derived compounds with multiple phenolic rings, exhibiting antioxidant and signalling activities.

Proanthocyanidins: oligomeric flavonoids of catechin and epicatechin units, abundant in grape seeds and linked to vascular benefits.

Endothelial Function: the ability of the vascular lining to regulate tone and maintain circulatory health via mediators like nitric oxide.

Gut Microbiota: the community of microorganisms in the gastrointestinal tract that influences digestion, metabolism and systemic inflammation.

Oxidative Stress: an imbalance between reactive oxygen species and antioxidant defences, contributing to tissue damage.

AMPK (AMP-activated Protein Kinase): a cellular energy sensor enzyme that orchestrates glucose and lipid metabolism under metabolic stress.

References

1. Classification of grape seed residues from distillation industries in Europe according to the polyphenol composition highlights the influence of variety, geographical origin and color. Food Chemistry X (2024).
2. Grape Pomace as a Cardiometabolic Health-Promoting Ingredient: Activity in the Intestinal Environment. Antioxidants (2023).
3. Cholesterol-Lowering Activity of the Major Polyphenols in Grape Seed. Molecules (2011).
4. Grape seed procyanidin B2 ameliorates hepatic lipid metabolism disorders in db/db mice. Molecular Medicine Reports (2017).
5. Effects of Grape Seed Proanthocyanidin Extract on Vascular Endothelial Function in Participants with Prehypertension: A Randomized, Double-Blind, Placebo-Controlled Study. Nutrients (2019).