Is Coffee and Tea a Threat or Ally to Cardiovascular Health?
Level 5 - mechanism / opinion, no new human data
Narrative review without systematic search or meta-analytic pooling
PubMed 38186410 · doi:10.7759/cureus.49991
What was done
This narrative review synthesized literature on the cardiovascular and metabolic effects of coffee and tea consumption, focusing on blood pressure responses, arrhythmias, heart failure, and insulin resistance.
What was found
The abstract reports no numerical data, effect estimates, or confidence intervals. It states that non-habitual consumers experience a brief initial increase in blood pressure, but consuming two to three cups per day demonstrates neutral or beneficial effects on arrhythmias, heart failure, and diabetes risk in individuals with and without cardiac disorders.
Why it matters
It questions routine clinical recommendations advising patients with cardiovascular disease to avoid caffeine, indicating moderate consumption is generally safe.
Limits
The abstract describes a narrative review without reporting systematic search methods, study counts, or quantitative data. Outcomes are influenced by unmeasured variations in consumption amounts, genetic polymorphisms, and comorbidities.
Cited by
- context Ninety percent of adults worldwide consume caffeine.