title: Protein intake and lean tissue mass retention following bariatric surgery.
abstract: OBJECTIVE
  Since current protein intake (PI) recommendations for the bariatric surgery (BS) patient are not supported by conclusive evidence, we aimed to evaluate the relationship between PI and lean tissue mass (LTM) loss following BS.
  
  
  METHODS
  Observational study including patients undergoing gastric bypass (GBP; n = 25) or sleeve gastrectomy (SG; n = 25). Dietary advice and daily PI were assessed prior to, and at 2- and 6-weeks, 4-, 8-, and 12-months after surgery. Body composition was assessed by dual energy X-ray absorptiometry (DXA). LTM loss as percent of weight loss (%LTM loss) at 4- and 12-months after surgery were the main outcome variables.
  
  
  RESULTS
  A PI ≥ 60 g/d was associated with lower %LTM loss at 4- (p = 0.030) and 12-months (p = 0.013). Similar results were obtained when a PI ≥ 1.1 g/kg of ideal body weight (IBW)/d was considered. Multilinear regression showed the only independent predictor of %LTM loss at 4-months was PI (expressed as g/kg IBW/d) (OR: -0.376, p = 0.017), whereas PI (OR: -0.468, p = 0.001) and surgical technique (OR: 0.399, p = 0.006) predicted 12-months %LTM loss.
  
  
  CONCLUSIONS
  Our data provide supportive evidence for the PI goals of >60 g/d or 1.1 g/kg IBW/d as a being associated with better LTM preservation in the BS patient.
authors.affiliation: Obesity Unit, Hospital Clinic Universitari, Barcelona, Spain.
authors.forename: Violeta
authors.initials: V
authors.lastname: Moizé
authors.forename: Alba
authors.initials: A
authors.lastname: Andreu
authors.forename: Lucía
authors.initials: L
authors.lastname: Rodríguez
authors.forename: Lilliam
authors.initials: L
authors.lastname: Flores
authors.forename: Ainitze
authors.initials: A
authors.lastname: Ibarzabal
authors.forename: Antonio
authors.initials: A
authors.lastname: Lacy
authors.forename: Amanda
authors.initials: A
authors.lastname: Jiménez
authors.forename: Josep
authors.initials: J
authors.lastname: Vidal
mesh_terms: D015502:Absorptiometry, Photon; D000328:Adult; D001823:Body Composition; D015992:Body Mass Index; D001835:Body Weight; D015331:Cohort Studies; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D015390:Gastric Bypass / Q000379:methods*; D015391:Gastroplasty; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000502:physiology; D009767:Obesity, Morbid / Q000601:surgery; D064167:Recommended Dietary Allowances; D015431:Weight Loss
chemical_list: D004044:Dietary Proteins