Digestery
Diet and food › Moderate Drinking and the Heart › Studies

Pooled review (meta-analysis)

Pooled review: drinking linked to less heart disease in follow-up studies, not gene studies

Carr and colleagues · Nature communications · 2024

Original title: A burden of proof study on alcohol consumption and ischemic heart disease.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Mixed

Cohort and case-control studies linked low to moderate drinking to lower heart disease risk. Pooled gene-based (Mendelian randomization) studies found no link. The two kinds of study disagree.

The study at a glance

Type of study
Pooled review (meta-analysis)
Who or what was studied
adults in cohort, case-control and gene-based studies
What was tested
Low to moderate alcohol drinking vs none, compared across study types
What it measured
The question itself: heart disease and death
Who has a stake
No stake declared
Funded by Gates Foundation and public bodies; no alcohol company ties declared.
Journal
Nature communications, 2024
Source
PubMed record 38744810. This page is based on the abstract only.

How much this study counts

  • ✓Pools the results of many studies.
  • •A pooled review is only as strong as the studies it pools.
  • ✓Measured the question itself: heart disease and death.
  • ✓No competing interests declared.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

This paper is not on the ladder. It is a pooled review (meta-analysis), and reviews and opinion pieces discuss studies that are already counted on the steps below.

↑ Stronger evidence

  1. Trials in people: heart disease

    0

    Not done yet. This is the step that would answer the question.

  2. Trials in people: other measures

    0

    None among the papers we read.

  3. Trials in people: lab tests or safety

    0

    None among the papers we read.

  4. Population studies

    5

    3 benefit, 1 mixed, 1 harm

  5. Blood levels and genes

    6

    1 mixed, 2 no difference, 3 harm

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Is moderate drinking good or bad for your heart?”

Not shown to help; may harm.

Confidence: very low. Based on 21 on-topic papers.

Read the full answer
  • Quoted in “What we found”: Population studies often link light to moderate drinking with fewer heart attacks and heart deaths than not drinking. These studies show links, not causes.
  • Quoted in “What we found”: Gene studies, built to reduce bias, found no protection from moderate drinking. Several tied more drinking to higher stroke or heart disease risk; pooled gene data showed no link.
  • Part of the finding “Population studies link light drinking to fewer heart deaths”.
  • Part of the finding “Gene studies find no protection, and stroke harm”.
  • Summed up in “What reviews found”: Re-analyzed cohort, case-control and gene-based studies (counts not given in the abstract). Cohort and case-control data linked low to moderate drinking to lower heart disease and heart attack risk; pooled gene data showed no link.
  • Marked as a key paper in the research timeline: Pooled review: population and gene studies disagree.

Other reviews on this question

See all 21 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads agreed on every checked field. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
Not yet. Required before search engines may list this page.

Spot an error? Email a flag with a link to your source, or use the form on the question page.