Anemia, iron and vitamin B12 deficiencies after sleeve gastrectomy compared to Roux-en-Y gastric bypass: a meta-analysis

The influence of the percentage of the common limb in weight loss and nutritional alterations after laparoscopic gastric bypass

“…A meta-analysis by Kwon et al [13], included 36 studies with a duration of 412 months, those comparing sleeve gastrectomy (SG) with RYGB, and those with available outcome data for postoperative anemia and iron and vitamin B12 deficiencies. Compared with the SG group, the odds ratio for postoperative vitamin B12 deficiency in the RYGB group was 3.55 (P o 0.001).…”

Sleeve gastrectomy and Roux En Y gastric bypass

“…Complications common to both procedures include bleeding, surgical site infection, deep venous thrombosis, staple line bleeding or leakage, adhesive obstruction, and nutritional deficiencies. Finally, Kwon et al [27] found that RYGB increases vitamin B12 deficiency rates while iron deficiency and anemia are similar between procedures. Risks specific to sleeve gastrectomy include functional and mechanical obstruction of the sleeve and gastric dilatation.…”

Micronutrient and Protein Deficiencies After Gastric Bypass and Sleeve Gastrectomy: a 1-year Follow-up

“…Nevertheless, some studies have demonstrated a considerably higher prevalence of nutrient deficiencies after SG [7][8][9][10][11]. Others, comparing GBP and SG, found quite similar prevalence after both procedures [12][13][14][15][16]. Although study designs differed, these converging results highlight the importance of daily multivitamin and mineral supplementation after both procedures, at least in the first year for SG, in accordance with the latest US guidelines [17].…”