Higher protein intake was linked with preserving nonfat tissue after bariatric surgery
Among adults after bariatric surgery, higher protein intake was linked with better preservation of fat-free mass, meaning the body's nonfat tissue. Results differed across study designs and measurement methods.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
After bariatric surgery, higher protein intake was associated with better preservation of fat-free mass, especially early after surgery. The review also described relationships involving other nutrients, but findings varied across studies. These results do not establish that protein intake alone caused tissue preservation or provide a single nutritional target proven appropriate for every postoperative patient.
The abstract reports variation in study designs and assessment methods without providing study counts or a pooled effect estimate. Its reported intake relationships cannot establish a universal causal effect or an individualized nutritional requirement.
What the review measured
Included studies linked postoperative intake, assessed through dietary records, recalls or blood markers, with changes in lean or fat-free mass. These body-composition outcomes concern nonfat tissue and should not be treated as direct measurements of strength or physical function.
Nutrition findings were broader and mixed
Higher carbohydrate intake correlated with poorer weight-loss outcomes, while higher fat intake was associated with greater fat-free mass loss. A trial of the DASH dietary pattern reported mixed body-composition findings. These outcomes answer different questions and should remain separate.
The original publication
The role of nutritional factors in fat-free mass preservation and body composition changes after bariatric surgery: a systematic review of the available evidence.
Abiri B, Valizadeh M, Seifi Z et al.
Eat Weight Disord · 2025
- PubMed ID
- 40618292
- Record checked
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