Health Science

New Pill To Trick The Gut Into Burning Fat Without Food

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Scientists are convinced that new clinically tested drugs may become a good option for the one-third of American adults who are obese and at risk of obesity-related diseases like diabetes and hypertension.

Researchers claim that a new pill could act like an “imaginary meal,” tricking the digestive system into burning fat even without any food. So far, this pill has only been tested in mice and is at least a year away from its first trial in humans.

Leading the research into this compound, called fexaramine, is Ronald Evans, director of the Gene Expression Laboratory at the Salk Institute for Biological Studies in California. He and a team of other researchers published a paper in Nature Medicine in January showing that fexaramine reduced weight gain, inflammation and helped turn white fat (which stores calories) into brown fat (which burns calories) in overweight mice compared to a control group. Evans is optimistic that it will work well in humans, too.

Fexaramine is a compound that activates a receptor that’s linked to the release of bile acids, or the digestive juices that help you absorb nutrients during a meal. They’re produced in the liver, then go to the gallbladder before being released into the intestine — all as part of the beginning of the digestion process.

“We realized the release of bile acids … flips [on] a series of genetic programs … that control intestinal activity,” says Evans. “The gut gets a signal that food is there, which mobilizes bloodflow to gather nutrients and prepares [fat] tissue to behave in a particular way.”

Another way to think about it, says Evans, is that “when you start eating, a baton gets passed … it’s like a relay. Once you start the relay, the fat tissue needs to anticipate food before it’s there.” And so fat starts to get burned.

Evans says he’s not sure precisely why, but when he gave overweight mice the fexaramine pill targeting the intestine, it triggered a switch for brown fat activity that led to weight loss. And all this happened without any food — which normally kick-starts this process.

“One of the ‘miracles’ of this drug is that it doesn’t require you to restrict calories,” he says. “That’s important, because if you want people to lose weight, it’s not easy to control the appetite center in the brain, or get them to change their eating.”

Another advantage, Evans adds, is that unlike the appetite suppressants or caffeine-based diet drugs on the market, fexaramine doesn’t dissolve in the blood. It’s active only in the intestines, which Evans says means fewer side effects. “We don’t have to worry about its effect on the heart or the brain, because it doesn’t go there,” he says.

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“New Pill To Trick The Gut Into Burning Fat Without Food”