Gelesis launches anti-obesity pill

April 22, 2010 by MassDevice staff

Boston-based Gelesis Inc. presents initial clinical data on its anti-obesity pill, which uses a super-absorbent hydrogel to induce feelings of satiety.

Gelesis logo

Curbing obesity may be as simple as popping a pill before meals.

A new capsule called Attiva does just that — expanding in the stomach to significantly reduce hunger between meals and make people feel fuller, according to the results of a clinical trial released by Boston-based Gelesis Inc.

The capsule contains a super-absorbent hydrogel comprised of food components. It's an alternative to potentially risky gastric bypass surgery. Obesity affects nearly 34 percent of American adults, according to a recent study published in the Journal of the America Medical Assn.

The capsule, classified as a medical device because it isn’t absorbed into the bloodstream like a drug, is swallowed with water. As it breaks down in the stomach, tiny hydrogel particles (about the size of a grain of salt) expand hundreds of times, creating less room for food. The enlarged particles, mixing with other food particles, swell against the stomach walls, signaling to the brain that the person is full. Afterwards, the particles — which have the same elasticity and viscosity as foods — disintegrate in the colon and pass naturally. You can see an animated demonstration of the process on the Gelesis website.

"For the first time a group was able to overcome the enormous technical hurdles in creating a super-absorbent polymer made entirely out of food," MIT Institute Professor Robert Langer said in prepared remarks. "This opens the door for entirely new uses of polymers in medicine and offers hope in treating obesity, which has become a serious health issue."