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Evolution of nutrient disorders following RYGB and OAGB procedures. a Mean Ferritin levels. b Mean total protein levels. c Mean vitamin D levels. RYGB Roux-en-Y gastric bypass, OAGB one anastomosis gastric bypass. Ferritin: *p: 0.006, **p: 0.008; Protein: ***p: 0.001, ****p: 0.001, *****p: 0.003; Vitamin D: ******p: 0.034, *******p: 0.066
