New book explores the science behind GLP-1 weight loss drugs

According to the CDC, 1 in 5 American adults is living with obesity. In recent years, many have turned to weight loss drugs containing GLP-1, a hormone that slows digestion and helps with sustained weight loss. In a new book, former FDA head Dr. David Kessler advocates for their use, but says they shouldn’t be seen as a quick and easy fix. Ali Rogin speaks with Kessler for more.