Insights & Discussion
Our findings showing that chocolate and flavonoid intake significantly improves the flow-mediated dilatation, provide mechanistic evidence to support a causal link between chocolate and flavonoid intake and lowered CVD risk.
This meta-analysis identified 23 studies that randomly assigned participants to dark chocolate, cocoa, or flavonoid in comparison with control groups in acute or short-term chronic interventions. At the end of our meta-analysis, we found a protective effect of acute and chronic consumption of dark chocolate and flavonoids on FMD. Greater improvement was seen in higher doses (>20 day) of chronic consumption of dark chocolate with more than about one month. A non-linear effect of acute consumption of dark chocolate and flavonoids on FMD was also found.
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Regular chocolate or cocoa consumption, rich in flavan-3-ols, has been associated with improved insulin resistance and blood vessel function, suggesting potential cardiovascular benefits.
2012 The American Journal of Clinical Nutrition Effects of chocolate, cocoa, and flavan-3-ols on cardiovascular health: a systematic review and meta-analysis of randomized trials Hooper L, Kay C, Abdelhamid A, Kroon PA, Cohn JS, Rimm EB, et al.
Systematic Review Cocoa Dark Chocolate Diastolic Blood Pressure
The study systematically reviewed 42 randomized controlled trials involving 1297 participants to investigate the impact of chocolate, cocoa, and flavan-3-ols on major cardiovascular disease risk factors. Utilizing a comprehensive search across multiple databases, the researchers conducted meta-analyses, assessing acute and short-term chronic interventions. Results revealed consistent improvements, including reduced insulin resistance (HOMA-IR), enhanced flow-mediated dilatation (FMD), and favorable effects on blood pressure and cholesterol levels.
The findings indicate promising cardiovascular benefits associated with chocolate or cocoa consumption. Notably, the study highlights improvements in insulin sensitivity, blood vessel function, and blood pressure, emphasizing the potential positive impact of flavan-3-ols found in these products.
Consumption of dark chocolate and cocoa products has been shown to significantly reduce serum levels of low-density lipoprotein (LDL) and total cholesterol (TC), indicating potential cardiovascular benefits.
2011 European Journal of Clinical Nutrition Effects of cocoa products/dark chocolate on serum lipids: a meta-analysis Tokede OA, Gaziano JM, Djoussé L
Meta-Analysis Cardiovascular Disease Cholesterol Cocoa
The research aimed to investigate the impact of dark chocolate and cocoa product consumption on lipid profiles, particularly focusing on LDL, TC, high-density lipoprotein (HDL), and triglycerides (TG). A thorough literature search identified 10 clinical trials involving 320 participants, with intervention durations ranging from 2 to 12 weeks. The analysis revealed a significant reduction in both LDL (difference in means: -5.90 mg/dl) and TC (difference in means: -6.23 mg/dl) levels following the consumption of dark chocolate or cocoa products. However, no statistically significant effects were observed for HDL and TG. These findings suggest short-term beneficial effects on total and LDL cholesterol with no major impact on HDL and TG.