Jessica Holloway-Haytcher uses an app that helps her track meals, exercise and keep in touch with an online coach. Mark Rogers Photography hide caption
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The Food and Drug Administration has identified hundreds of supplements tainted with pharmaceuticals since 2007, the study shows. Courtesy of FDA Flickr hide caption
If patients are obese, their physicians should refer them to behavior-based weight loss programs or offer their own, a national panel of experts says. Yet many doctors aren't having the necessary conversations with their patients. Tetra Images/Getty Images hide caption
A small new study shows that successful dieters had an abundance of a bacteria called Phascolarctobacterium, whereas another bacteria, Dialister, was associated with a failure to lose weight. sorbetto/Getty Images hide caption
Cutting back up to 25 percent of your calories per day helps slow your metabolism and reduce free radicals that cause cell damage and aging. But would you want to? VisualField/Getty Images hide caption
You May Live Longer By Severely Restricting Calories, Scientists Say
Harnessing the power of wearable devices, data, education and a peer support group, people with prediabetes can lose weight and fend off the disease. Katherine Streeter for NPR hide caption
This Chef Lost 50 Pounds And Reversed Prediabetes With A Digital Program
John Locke lounges at home. Owners often say they don't care if their pet is "fat" — there's just more to love! Rebecca Flanagan hide caption
What seems like an obvious choice to lose weight doesn't look so obvious based on available data. Sharon Pruitt/Getty Images hide caption
An increasing number of overweight Americans have lost the motivation to diet. enisaksoy/Getty Images hide caption
Is Dieting Passe? Study Finds Fewer Overweight People Try To Lose Weight
Dear Sugar Radio | Subscribe Courtesy of WBUR hide caption
Athletes have been using high-intensity interval training for decades, and it's now being adopted by more casual exercisers. Westend61/Getty Images hide caption
They're so cute. So colorful. But are they really making you fitter? Paul Marotta/Getty Images for Fitbit hide caption
A new study counters the presumption that bariatric surgery is just a short-term fix for severe obesity. Hero Images/Getty Images hide caption
In her new book, neuroscientist Sandra Aamodt tackles why traditional diets don't work for many people, and often leave the dieter worse off than before. PM Images/Getty Images hide caption
A 1950s poster from the National Dairy Council. Ads like these helped fuel the rise of cereal as a breakfast staple. David Pollack/Corbis via Getty Images hide caption
Danny Cahill (left) won Season 8 of The Biggest Loser in 2009 by losing an amazing 239 pounds. He's pictured with at-home prize winner Rebecca Meyer. In the years since, Cahill has put back on more than 100 pounds, he told The New York Times. NBC via Getty Images hide caption
'Biggest Loser' Lessons: Why The Body Makes It Hard To Keep Pounds Off
Asafa Powell of Jamaica was barred from competition after testing positive for the stimulant oxilofrine. Streeter Lecka/Getty Images hide caption
Oprah Winfrey arrives at the 87th Academy Awards nominees luncheon at the Beverly Hilton Hotel on Monday, Feb. 2, 2015, in Beverly Hills, Calif. Jordan Strauss/Invision/AP hide caption
If I log that milkshake do the calories still count? iStockphoto hide caption