Diet and probiotic review reports muscle changes, with major evidence gaps
Some interventions were linked to better strength or walking speed, but most studies had high risk of bias and did not establish a gut-microbe mechanism.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review reported better muscle strength with probiotics and whole-food diets enriched in fiber, and faster walking with probiotics. Muscle-mass findings depended on diet type and participant subgroup. These signals remain uncertain because most studies had high risk of bias, and studies of people with diagnosed sarcopenia could not contribute to the pooled estimates.
The abstract omits comparison-group details and confidence intervals for the reported benefits. It also cannot establish whether gut-microbe changes explain the muscle findings.
Population matters
Studies involving diagnosed sarcopenia lacked enough data for quantitative pooling. Results for strength, muscle mass, and walking speed therefore should not be read as proof that these interventions treat sarcopenia in affected patients.
Subgroup findings need context
High-protein diets showed muscle-mass benefits in women and with interventions lasting at least 12 weeks. Weight-loss diets showed benefits when the average age was under 60 and treatment lasted no more than 12 weeks.
The original publication
Effect of host and gut microbiota-altering interventions on sarcopenia or its defining parameters: a systematic review and meta-analysis of nutrition-based intervention studies.
Lapauw L, Amini N, Switsers E et al.
Aging Clin Exp Res · 2025
- PubMed ID
- 41269489
- Record checked
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