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Updated: May 3, 2026

Techniques of Sleeve Gastrectomy and Modified Roux-en-Y Gastric Bypass in Mice
Published on: March 20, 2017
[Micronutrient deficiencies one year after sleeve gastrectomy]
Verónica Alvarez1, Ada Cuevas, Cristina Olivos
1Departamento de Nutrición. Clínica Las Condes. Santiago. Chile.. mfariasn@clc.cl.
Sleeve gastrectomy patients frequently experience deficiencies in iron, calcium, and vitamin D. Long-term supplementation is crucial for managing these micronutrient deficits after bariatric surgery.
Area of Science:
- Bariatric Surgery
- Nutritional Science
- Endocrinology
Background:
- Obesity is a major global public health concern.
- Surgical intervention, such as sleeve gastrectomy (SG), is recommended for severe obesity with comorbidities.
Purpose of the Study:
- To assess the prevalence of micronutrient deficiencies.
- To evaluate food intake at least 12 months post-sleeve gastrectomy.
Main Methods:
- Cross-sectional study of 40 patients who underwent SG.
- Measured serum levels of key vitamins (B12, D), minerals (calcium, iron, zinc), parathyroid hormone, and bone mineral density.
- Utilized a food intake questionnaire and statistical analysis (Pearson/Spearman tests).
Main Results:
- High prevalence of vitamin D deficiency (43%) and low calcium levels (68%).
- Anemia (28%) and iron deficiency (38%) were common.
- Folic acid and vitamin B12 deficiencies observed in 13% of patients.
Conclusions:
- Iron, calcium, and vitamin D deficiencies are prevalent after SG.
- Long-term vitamin and mineral supplementation should be considered for all patients.
- Further research is needed to establish specific post-SG supplementation guidelines.
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