Acute dark chocolate and cocoa ingestion and endothelial function: a randomized controlled crossover trial

Area of Science:

• Cardiovascular Health
• Nutritional Science
• Human Physiology

Background:

• Emerging research suggests potential cardioprotective effects associated with the consumption of dark chocolate rich in cocoa.
• Understanding the specific impact of cocoa on vascular health is crucial for dietary recommendations.

Purpose of the Study:

• To investigate the acute effects of consuming solid dark chocolate and liquid cocoa on endothelial function and blood pressure.
• To compare the impact of sugar-free versus sugared cocoa preparations on these cardiovascular markers.

Main Methods:

• A randomized, placebo-controlled, single-blind crossover trial involving 45 overweight adults.
• Participants consumed either dark chocolate, cocoa (sugar-free or sugared), or a placebo in separate study phases.
• Endothelial function was assessed via flow-mediated dilatation, and blood pressure was monitored.

Main Results:

• Both solid dark chocolate and liquid cocoa significantly improved endothelial function compared to placebo.
• Blood pressure was reduced following the ingestion of dark chocolate and sugar-free cocoa.
• Sugar-free cocoa demonstrated a greater improvement in endothelial function than regular sugared cocoa.

Conclusions:

• Acute consumption of dark chocolate and cocoa positively impacts endothelial function and blood pressure in overweight individuals.
• The sugar content in cocoa preparations may diminish these beneficial effects.
• Sugar-free cocoa formulations appear to enhance the positive vascular responses.