Weight loss from bariatric surgery, not the type of procedure used, appears responsible for improvement of metabolic responses in obese, insulin resistant, nondiabetic patients, according to results from a study published online November 26 and in the December issue of the Journal of Clinical Investigation.It has nothing to do with the surgery.
Researchers led by Samuel Klein, MD, from the Center for Human Nutrition, the Washington University School of Medicine in St. Louis, Missouri, compared the metabolic effects of 20% weight loss induced by either laparoscopic adjustable gastric banding (LAGB) or Roux-en-Y gastric bypass (RYGB) surgery in nondiabetic, insulin-resistant obese adults.
They found that both procedures equally improved insulin sensitivity and β-cell function and concluded that the advantages were derived from the amount of weight lost (LAGB, 19.3% ± 1.9% and RYGB, 20.1% ± 2.3%, respectively).
It has all to do with the weight loss.
And because conventional dieting is starvation dieting, dieters fail and the surgery becomes "necessary."