Long-term nutritional outcome after gastric bypass

Area of Science:

• Bariatric Surgery
• Nutritional Science
• Endocrinology

Background:

• Roux-en-Y gastric bypass (RYGB) is a common bariatric procedure.
• Long-term nutritional status and weight management after RYGB require ongoing evaluation.

Purpose of the Study:

• To prospectively document weight loss and nutritional status in patients 5+ years after RYGB.
• To identify factors influencing long-term weight loss and nutritional imbalances post-RYGB.

Main Methods:

• Seventy-five patients were assessed 83.4 months post-RYGB.
• Weight loss, body mass index (BMI), and nutritional markers were documented.

Main Results:

• Significant long-term deficits were observed for magnesium, hemoglobin, iron, ferritin, zinc, vitamin B12, vitamin D3, and beta-carotene.
• Initial low levels of iron, transferrin, zinc, and vitamin B12 were noted preoperatively.
• Excess weight loss (EWL) correlated with reduced drug consumption, diabetes, BMI, and the 2-year biochemical profile.

Conclusions:

• A common pattern includes initial weight loss, moderate late regain, anemia, and multiple nutrient deficits.
• Risk factors for deficits include massive weight loss, vomiting, dumping syndrome, and reproductive age for women.
• Two-year nutritional assessments are recommended for their long-term predictive value regarding EWL.