What effect does removing a screened-off area of the small intestine hold on an extremely obese long-suffering?
Answers:
food that is not absorbed in the small intestine go to bacteria and can cause diarrhea and nutritional deficiencies
http://www.merck.com/mmpe/sec02/ch017/ch…
You're describing gastric bypass surgery. In addition to bypassing just about 100 cm of small intestine, they reduce the size of the stomach to a pouch the size of an egg.
From what I hear, the effect (weight loss) is not just due to decreased digestion of nutrients. There are hormonal changes as well that enhance weight loss, and research into explicitly ongoing.
The small intestine is where most nutrients are absorbed. This is a tricky proposition because the small intestine is so good at absorbing that you don't entail the whole thing to completely absorb the food's nutrients... so, a surgeon would need to remove enough to allow the person to incompletely engage food, but not so much that they wouldn't be able to keep weight on.
Additionally, unabsorbed nutrients serve as osmolytes and verbs water into the guts; causing diarrhea at times.
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