What does this research mean for the field?

Dark chocolate consumption does not significantly improve VO2max in healthy individuals. Novelty: ClaimNovelty.SYNTHESIS. Consensus alignment: ConsensusAlignment.NEUTRAL.

February 25, 2025Physiological ReportsOpen Access

Response of VO2max to dark chocolate consumption in healthy subjects: A systematic review and meta‐analysis of randomized controlled trials

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Why the study?

The potential role of dark chocolate in enhancing exercise performance remains underexplored, and its specific impact on endurance performance, particularly VO2max, has not been conclusively established.

Does dark chocolate consumption improve VO2max in healthy individuals?

Structured PICO

Does dark chocolate consumption improve VO2max in healthy individuals?

Population

144 healthy individuals from 5 randomized controlled trials

Intervention

Dark chocolate consumption

Outcome

VO2maxsurrogate

This meta-analysis demonstrates that dark chocolate consumption does not significantly improve VO2max in healthy individuals.

Implication

Dark chocolate does not improve VO2max; confirms no ergogenic effect and supports avoiding its use for aerobic performance.

Abstract

The potential role of dark chocolate (DC) in enhancing exercise performance remains underexplored. While DC has been associated with various health benefits, its specific impact on endurance performance, particularly VO 2max , has not been conclusively established. This meta‐analysis examined the effect of DC on VO 2max in healthy individuals using PRISMA guidelines. Following the application of inclusion and exclusion criteria, five randomized controlled trials (RCTs) involving 144 participants were included, with VO 2max as the primary outcome. The meta‐analysis revealed no significant effect of DC on VO 2max (SMD = 0.14, 95% CI: −0.16 to 0.44, p = 0.36). Heterogeneity among the studies was low ( Q ‐value = 3.34, I 2 = 0.00, p = 0.50), and sensitivity analysis confirmed the robustness of the findings, as excluding individual studies did not alter the results (SMD = 0.14, 95% CI: −0.16 to 0.44, p = 0.36). In conclusion, this meta‐analysis suggests that DC consumption does not significantly improve VO 2max in healthy individuals. Future research should explore the effects of DC on other aspects of exercise performance, as well as its long‐term impact, to better understand its potential role in athletic and health‐related outcomes.