Continued from Gastric Lap-Band Procedure.

Who can have Gastric Bypass surgery: The extremely obese (those with a BMI of 40 or above who are about 100 pounds overweight).

Those with a BMI between 35 and 40 may be considered, if other conditions such as severe sleep apnea or severe diabetes are present.

What Gastric Bypass surgery entails: The stomach is divided and made smaller, and the small intestine is cut and rerouted to the stomach, bypassing the duodenum, the first part of the small intestine.

What to expect immediately after Gastric Bypass surgery: A liquid diet for three weeks, after which you will start to eat only 900 to 1,000 calories a day, made up of nutrient-dense foods that are high in protein and low in sugars and starches.

How long it takes to see Gastric Bypass results: It takes about 12 months to see maximum weight loss, but you can expect to lose about 50 to 65 percent of excess weight.

Gastric Bypass side effects:

• Hair loss two to four months after the surgery.
• Vomiting after eating too much sugar. The sugar enters the intestine too rapidly, causing fluids to shift and insulin levels to spike, leading to something called dumping syndrome.

The food dumps from the stomach into the intestines too quickly, causing cramping, diarrhea, and vomiting.

• Vitamin chugging. Food bypasses the duodenum, where the absorption of vitamins, minerals, and other nutrients begins, which creates changes in digestion and the efficiency of vitamin absorption.

Some clinics require vitamin B12 shots every six months for life.

• Seven scars around the abdomen from where the laparoscope was inserted, or one large vertical incision from an open surgery

Gastric Bypass mortality stats: 1 death per 200 procedures.