TABLE 5. - Bariatric surgery in the elderly: laboratory tests related to nutritional deficiencies (average).

	Pre	Post
Hemoglobin (g/dl)	13.7	13.2
Ferritin (ng/ml)	162.7	121.8
Albumin (g/dl)	4.3	4,1
Total calcium (mg/dl)	9.1	9.0
Ionic calcium (mg/dl)	4.8	4.9
PTH (pg/ml)	70.7	78.8
Vitamin D (ng/ml)	21.7	22.9
Vitamin B12 ( (pg/ml)	489	744.2