
A new study suggests lean beef could be better for gut health than chicken, challenging dietary assumptions.
Story Highlights
- Lean beef may disrupt gut microbiota less than chicken.
- Study shows no significant differences in overall diversity.
- Research suggests a need for more nuanced dietary studies.
- Study highlights the importance of dietary context.
Study Insights on Meat and Gut Health
In July 2025, a study published in *Molecular Nutrition and Food Research* revealed that lean beef might be slightly less disruptive to gut microbiota than chicken. Conducted by Spanish researchers, this randomized cross-over trial involved healthy young adults consuming lean Pirenaica beef and white-meat chicken. Although changes in microbial diversity were modest, the study challenges previous assumptions that all meat affects gut health similarly. It emphasizes the necessity for more detailed research on different meat types and their specific impacts on health.
The research showed that while neither beef nor chicken significantly altered overall microbial diversity, chicken meals were linked to a decline in diversity and reductions in beneficial bacteria. Conversely, beef exhibited a smaller impact, with only one notable reduction in Chloroflexota and an increase in Blautia, a genus associated with gut health. These findings suggest that lean beef could potentially be less harmful to gut health compared to chicken, although the differences were not statistically significant.
Implications for Dietary Guidelines
These results have implications for dietary guidelines and consumer choices, particularly concerning red meat’s role in health. The study’s preliminary nature, due to its small sample size and self-reported dietary intake, limits its generalizability. Nevertheless, it indicates a potential for lean beef to be included in healthy dietary patterns without adverse effects on gut microbiota. Industry experts, such as the National Cattlemen’s Beef Association, have welcomed these findings as supportive of lean beef’s place in balanced diets.
Experts from Case Western Reserve University, however, caution that these findings are hypothesis-generating rather than actionable. They emphasize that meat quality and moderation are crucial, and that larger studies are needed to confirm these results. The study authors themselves acknowledge the need for further research to explore the effects of different beef types and preparation methods on gut health.
Future Research Directions
The study underscores the importance of dietary context, such as fiber intake, in mitigating meat’s impact on gut health. Previous research indicates that dietary fiber can help counteract the negative effects of meat consumption. This study opens the door for more granular research into specific meat types and preparation methods, which could eventually influence dietary guidelines and marketing strategies within the beef and chicken industries. As the debate over red meat’s health effects continues, such research will be vital in providing clear, evidence-based recommendations to consumers.
While some experts advise against overgeneralizing from small studies like this one, the findings contribute to a growing body of evidence that lean red meat can be part of a healthy diet. As more studies are conducted, the understanding of how different meats affect gut health will continue to evolve, potentially impacting dietary habits and industry practices.
Sources:
Molecular Nutrition & Food Research (PubMed)
Royal Society of Chemistry (rat study)


