For women with severe obesity and metabolic syndrome who had gastric bypass surgery, adding the removal of the omentum fat led to more weight loss over time compared to just the bypass alone.

Adding omentum removal to gastric bypass surgery didn't change levels of hormones produced by fat tissue (adipokines) in women with severe obesity and metabolic syndrome.

Non-diabetic women with severe obesity and metabolic syndrome who had gastric bypass surgery with omentum removal had better overall insulin function (disposition index) at 6 and 12 months compared to those who only had the bypass.

For non-diabetic women with severe obesity and metabolic syndrome who had gastric bypass surgery, adding omentum removal helped maintain their body's insulin response to sugar after one year, while those without it saw a decline.

Women with severe obesity and metabolic syndrome who had gastric bypass surgery with omentum removal had lower levels of a marker for inflammation (CRP) after one year compared to those who only had the bypass.

After one month, morbidly obese women who had gastric bypass surgery lost a higher percentage of body fat than those who followed a low-calorie diet, even though both groups lost the same amount of total weight. This suggests that the surgery affects fat metabolism in a way that diet alone does not.