Johnston · Annals of internal medicine 2019 · practice guideline based on systematic reviews · n=5 systematic reviews

Unprocessed Red Meat and Processed Meat Consumption: Dietary Guideline Recommendations From the Nutritional Recommendations (NutriRECS) Consortium.

Cited 322 times in the scientific literature.

Level 1 - systematic review of randomized trials

Practice guideline developed from five de novo systematic reviews using GRADE methodology

PubMed 31569235 · doi:10.7326/M19-1621 · record verified 2026-08-29

What was done

A 14-member international guideline panel developed recommendations on unprocessed red meat and processed meat consumption based on 5 de novo systematic reviews (4 on health effects and 1 on health-related values and preferences). The panel applied the Nutritional Recommendations (NutriRECS) process and GRADE methodology. Environmental and animal welfare considerations were excluded.

What was found

The abstract reports no numerical risk estimates or effect sizes. The panel issued weak recommendations based on low-certainty evidence suggesting that adults continue their current consumption of unprocessed red meat and continue their current consumption of processed meat.

Why it matters

This guideline challenged prevailing dietary recommendations by concluding that the existing evidence against red and processed meat consumption is of low certainty, leading to a weak recommendation to maintain current intake.

Limits

The abstract does not report numerical outcome estimates or sample sizes from the component reviews. The underlying evidence was judged to be of low certainty, recommendations were weak, and environmental impact and animal welfare were omitted.

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