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. Author manuscript; available in PMC: 2015 May 7.
Published in final edited form as: Obesity (Silver Spring). 2013 Jun;21(6):1093–1103. doi: 10.1002/oby.20364

TABLE 1. Summary of bariatric procedures effect on weight loss, gastro-intestinal hormones and vagal activity.

Procedure Weight loss
(avg %EWLa)		 GI hormones Vagal activity
LAGB 42.6–55.2 GLP-1, PYY no change
GIP no change
Ghrelin ↑, ↓ or no change		 Band adjustment affects vagal activity?
SG 53.3–77.5 GLP-1 ↑, PYY ↑
GIP ↑(?)
Ghrelin ↓		 Preservation or sectioning of
 vagus might affect food intake
RYGBP 59.3–63.2 GLP-1 ↑↑, PYY ↑↑, oxyntomodulin ↑
GIP ↓ or no change
Ghrelin ↑, ↓ or no change		 Preservation or sectioning of
 vagus might affect food intake
BPD 56.0–73.7 GLP-1 ↑↑, PYY ↑↑
GIP ↓
Ghrelin ↑, ↓ or no change		 Preservation or sectioning of
 vagus might affect food intake
a

As reported in references 10-13.