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Updated: Jul 3, 2026

Roux-en-Y Gastric Bypass Operation in Rats
Published on: June 11, 2012
Relation between carbohydrate intake and weight loss after bariatric surgery
Silvia Leite Faria1, Orlando Pereira Faria, Tatiane Carvalho Lopes
1University of Brasília, Brasília, Brazil. silvialeitefaria@brturbo.com.br
Glycemic load (GL) and carbohydrate grams (g CHO) significantly impact weight loss and maintenance after bariatric surgery. Lowering GL and g CHO intake can aid patients in achieving and sustaining their weight loss goals.
Area of Science:
- Bariatric Surgery
- Nutrition Science
- Metabolic Health
Background:
- Weight loss and maintenance post-bariatric surgery are linked to satiety.
- Satiety can be influenced by dietary glycemic load (GL) and carbohydrate (g CHO) intake.
Purpose of the Study:
- To investigate the impact of g CHO and GL on weight loss in bariatric surgery patients.
- To determine the relationship between dietary factors and weight loss outcomes.
Main Methods:
- Measurements included body weight, BMI, excess weight loss (EWL), average monthly weight loss (AMWL), and energy intake.
- Calculations involved glycemic load (GL) and correlations between variables.
- Multiple linear regression analysis was used to assess diet variables' effect on weight loss.
Main Results:
- The study population achieved 66% EWL, with average energy intake of 1220 kcal/day and GL of 73.2.
- Negative correlations were observed between AMWL and energy intake (p=0.04), AMWL and GL (p=0.009), and AMWL and g CHO (p=0.003).
- GL and g CHO intake accounted for 62% of the variance in AMWL.
Conclusions:
- Glycemic load and grams of carbohydrate are significant factors influencing weight loss.
- These dietary components can be valuable tools for weight management in Roux-en-Y Gastric Bypass (RYGB) patients.
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