Study: Despite More Exercise, Us Losing Obesity Battle
A new study shows that even though Americans have become more physically active in the last decade, obesity rates have soared. Obesity was especially pronounced in the Southeast. Dr. John LaPook reports.
Different kinds of bacteria that live inside the gut can help spur obesity or protect against it, say scientists at Washington University in St. Louis who transplanted intestinal germs from fat or lean people into mice and watched the rodents change.