What does this research mean for the field?

Chronic dark chocolate or cocoa intake, particularly at dosages of ≥500 mg flavanol per day for at least 8 weeks, significantly improves specific dimensions of cognitive function such as executive function, attention, processing speed, and language. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To assess the effects of chronic dark chocolate or cocoa consumption on multiple domains of cognitive function across randomized controlled trials.

August 27, 2026Nutrition Reviews

Effect of Chronic Dark Chocolate or Cocoa Intake on Cognitive Function: A Grading of Recommendations Assessment, Development, and Evaluation (GRADE)–Assessed Systematic Review and Meta-Analysis of Randomized Controlled Trials

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Authors

ZAZahra ArabpourShahid Bahonar University of Kerman ZAZeynab ArabpourShahid Bahonar University of Kerman SJShima JazayeriIran University of Medical Sciences

Discussion

Member takes

Overview

Systematic review and meta-analysis reveals improved executive function and verbal fluency from chronic cocoa intake in adults, suggesting flavanols support specific cognitive domains.

Key Points

To assess the effects of chronic dark chocolate or cocoa consumption on multiple domains of cognitive function across randomized controlled trials.
Systematic search of PubMed, Web of Science, and Scopus databases through January 2025 for randomized controlled trials (PROSPERO CRD42024568294).
Analyzed 16 randomized controlled trials encompassing 2,847 participants evaluating regular dark chocolate or cocoa intake.
Calculated weighted mean differences (WMD) using a random-effects model and evaluated evidence quality using the GRADE system and Cochrane risk of bias tool.
Chronic dark chocolate or cocoa intake significantly improved Trail Making Test Part A (WMD, −4.51; 95% CI, −8.41 to −0.60; P = .024) and Part B (WMD, −13.1; 95% CI, −17.73 to −8.47; P < .001), as well as Verbal Fluency Test scores (WMD, 3.15; 95% CI, 0.71–5.60; P = .012).
Subgroup analyses revealed greater cognitive improvements with cocoa flavanol dosages ≥500 mg/day and intervention durations ≥8 weeks.
No significant benefits were observed on Mini-Mental State Examination scores, and findings regarding verbal and working memory remained inconsistent across studies.

Cite This Study

Arabpour et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe9b910c91c1e926219f7 https://doi.org/10.1093/nutrit/nuaf286

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August 27, 2026Nutrition Reviews

Effect of Chronic Dark Chocolate or Cocoa Intake on Cognitive Function: A Grading of Recommendations Assessment, Development, and Evaluation (GRADE)–Assessed Systematic Review and Meta-Analysis of Randomized Controlled Trials

View Full Paper

Ask AI

Bookmark

Authors

ZAZahra ArabpourShahid Bahonar University of Kerman ZAZeynab ArabpourShahid Bahonar University of Kerman SJShima JazayeriIran University of Medical Sciences

Discussion

Member takes

Overview

Systematic review and meta-analysis reveals improved executive function and verbal fluency from chronic cocoa intake in adults, suggesting flavanols support specific cognitive domains.

Key Points

To assess the effects of chronic dark chocolate or cocoa consumption on multiple domains of cognitive function across randomized controlled trials.
Systematic search of PubMed, Web of Science, and Scopus databases through January 2025 for randomized controlled trials (PROSPERO CRD42024568294).
Analyzed 16 randomized controlled trials encompassing 2,847 participants evaluating regular dark chocolate or cocoa intake.
Calculated weighted mean differences (WMD) using a random-effects model and evaluated evidence quality using the GRADE system and Cochrane risk of bias tool.
Chronic dark chocolate or cocoa intake significantly improved Trail Making Test Part A (WMD, −4.51; 95% CI, −8.41 to −0.60; P = .024) and Part B (WMD, −13.1; 95% CI, −17.73 to −8.47; P < .001), as well as Verbal Fluency Test scores (WMD, 3.15; 95% CI, 0.71–5.60; P = .012).
Subgroup analyses revealed greater cognitive improvements with cocoa flavanol dosages ≥500 mg/day and intervention durations ≥8 weeks.
No significant benefits were observed on Mini-Mental State Examination scores, and findings regarding verbal and working memory remained inconsistent across studies.

Cite This Study

Arabpour et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe9b910c91c1e926219f7 https://doi.org/10.1093/nutrit/nuaf286

Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

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