Fig. 2From: Preventing calcium and vitamin D deficiencies following weight loss and metabolic surgerySerum vitamin D levels following obesity surgery. Blue: sleeve gastrectomy. Red: Roux-en-Y Gastric bypass. Acceptable laboratory values: 25-OH vitamin D > 50 nmol/L (shaded light blue). Outliers: circle–1.5–3 × interquartile range, asterisk– > 3 × Interquartile range above the third quartile or below the first quartileBack to article page