Current recommendations for protein intake after bariatric surgery are not based on strong scientific evidence. It remains unclear how much protein should be eaten to minimize muscle loss and preserve the metabolism and function of individuals post-bariatric surgery. The objective of this study is to analyze the relationships between changes in body composition, nutrition and protein intake, and muscle function after bariatric surgery to further our understanding of the nutritional needs of patients after bariatric surgery. We intend to recruit around 75 participants, men and women, aged between 18 and 65 years. Participants will be recruited from the Bariatric Surgery Clinic, McGill University Health Center.
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Change in weight
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Change in BMI
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Change in fat mass
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Change in overall body fat percentage
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Resting Energy Expenditure
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Substrate Oxidation
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Nurition and Protein Intake
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.
Hormone and Inflammatory Marker Assays
Timeframe: Baseline (pre-operation), and at 3-months and 6-months post-operation.