The goal of any weight-loss surgery is to reduce the risk of medical conditions or death, associated with obesity. Bariatric surgery is effective in achieving these objectives, and also has additional benefits such as reducing the amount of money spent on medication, cutting down on sick days, and improving quality of life.
Bariatric surgery outcomes showed that overall, patients lost an average of 70 percent of their excess weight; total weight loss varied depending on the specific procedure performed.
Health conditions which disappear or decrease in incidence after bariatric surgery.

1. Diabetes
2. Hypertension (high blood pressure)
3. Obstructive Sleep apnea (snoring)
4. Arthritis
5. improved infertility
6. Hypercholestrolemia
7. risk of certain type of cancers like  breast, rectum, colon, endometrial, esophageal, kidney, prostate
8. Stroke
9. Heart disease
10. Depression
11. Polycystic ovarian disease

You should expect to make some changes to your diet after undergoing bariatric surgery. The stomach will be reduced to a much smaller size and, as a result, the diet will be restricted to liquids for 1-2 weeks and then slowly progress to regular foods over 1-2 months. Total daily calories range from 500 calories/day early on to 1000-1200 at one year after surgery. In order to ensure good nutrition and health, you must also pay very close attention to the types of food you eat. Discussing your diet with a nutritionist both before and after bariatric surgery can prepare you to make educated and healthy food choices. One is encouraged to eat protein first than carbohydrates and fruits. Aerated drinks are usually avoided because they can stretch the stomach.
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Exercise after Bariatric Surgery

It is important that bariatric surgery patients adopt a fitness routine after undergoing the procedure. While weight loss surgery is effective in helping patients lose weight in the year after the procedure is performed. Walking is the ideal exercise for the period shortly after surgery. Other exercises may be added to the routine in six to eight weeks, but walking and less vigorous but steady exercise should be a long-term goal.   This alters the metabolism so that the body begins to burn fat instead of muscle. Exercising also helps patients lose weight more rapidly.
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Guidelines for Weight Loss Surgery

• BMI > 32 with co-morbid disease
• BMI > 38 or greater without co-morbid disease
• Comorbidity: You have a life-shortening disease process, heart disease, diabetes or obstructive sleep apnea that can be improved by losing weight.
• Obese for an extended period of time, at least three to five years.
• Able to effectively care for yourself and follow a physician’s instructions.
• Motivated to lose weight and maintain a healthful lifestyle.
• Do not abuse drugs or alcohol.
• Nonsmoker or have quit smoking.
• Failure of other non-surgical measures

• Gastric lap banding
• Sleeve Gastrectomy
• Gastric Bypass
• Mini gastric bypass