More from 60 Minutes: The gastric bypass effect on diabetes, cancer

It's pretty well known to doctors that the most successful treatment for obesity is surgery, especially the gastric bypass operation. But here's something the medical world is just realizing: that the gastric bypass operation has other even more dramatic effects. It can force type 2 diabetes into almost instant remission and it appears to reduce the risk of cancer.

Surgeons have been performing bariatric, or weight loss operations since the 1950s, but they're much safer than they used to be. They're typically done laparoscopically now, where doctors use tiny surgical tools and video cameras instead of making big, deep incisions.

Despite the increase in obesity, only a small number of people have had the gastric bypass operation. Read more More from 60 Minutes: The gastric bypass effect on diabetes, cancer >>

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