Table 1.

Timetable and scope of routine laboratory measurement for nutrition monitoring after bariatric surgery

	LSGa	RYGBb	BPD-DSb
Protein	X	x	x
Ferritin	X	x	x
Vitamin B12	X	x	x
Folate	X	x	x
Thiamine	X	x	x
Vitamin D	X	x	x
Calcium	X	x	x
Vitamin E		x	x
Vitamin K		x	x
Copper			x
Parathyroid hormone		x	x
Vitamin A		x	x
Selenium			x
Zinc		x	x

Based on recommendations from the S3 Guideline [19, 23, 40, 41, 42]. LSG, laparoscopic sleeve gastrectomy; RYGB, Roux-en-Y gastric bypass; BPD-DS, biliopancreatic diversion with duodenal switch.

^aAfter 6 and 12 months, then yearly.

^bAfter 3, 6, and 12 months, then yearly.