Malabsorptive procedures
Roux-En-Y Gastric Bypass Procedures that alter digestion are known as malabsorptive procedures. Malabsorptive techniques are used to reduce the length of the intestine so that the body absorbs fewer calories. According to the American Society for Weightloss Surgery and the National Institute of Health, this procedure is the current gold standard for weight loss surgery. During this surgery, doctors create a small (15 to 20cc) stomach pouch. The remainder of the stomach is completely stapled shut and divided from this newly formed pouch. The outlet from this newly formed pouch empties directly into the lower portion of the jejunum in the small intestine, thus eliminating the duodenum and a portion of the jejunum from the absorptive circuit. The omitted segment is connected into the side of the jejunum creating the "Y" shape that gives the technique its name. The length of each of the segments can be adjusted to produce varying levels of malabsorption. However, just like every other surgical procedure, despite its many advantages, this procedure has its risks as well. The following risks, however, can be easily overcome with attention to an iron and calcium rich diet and a healthy lifestyle.

Poor absorption of iron, calcium leading to deficiencies due to bypass of duodenum

Chronic anemia due to Vitamin B12 deficiency (can be overcome using pills, injections)

‘Dumping syndrome’ can occur due to rapid emptying of stomach into the small intestine, triggered when too much sugar, food are consumed and may result in nausea, weakness, etc

Possibility of metabolic bone disease resulting in bone pain, loss of height, humped back, fractures