The majority of voters in San Francisco and Berkeley, Calif., voted in favor of a soda tax, but the measure didn't gain the required two-thirds majority required in San Francisco. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Proponents of the taxes say that if the measures pass, the money would be directed, in San Francisco, toward childhood nutrition and recreation and, in Berkeley, into the city's general fund. Joel Saget /AFP/Getty Images hide caption

itoggle caption Joel Saget /AFP/Getty Images

Photos from Liz Paul's blog entries on Prior Fat Girl. The blog chronicles women's weight loss journeys. Courtesy of Liz Paul/PriorFatGirl.com hide caption

itoggle caption Courtesy of Liz Paul/PriorFatGirl.com

Carlos Romero and girlfriend Kate Rowe sit down for a meal they cooked together. Two years ago, Carlos Romero weighed 437 pounds. Mike Kane for NPR hide caption

itoggle caption Mike Kane for NPR

We are all Russian nesting dolls: Our intestines house many bacteria, which house many viruses. These so-called bacteriophages are likely as important for our health as the bacteria they live in. Lisa Brown for NPR hide caption

itoggle caption Lisa Brown for NPR

Helping employees take the time to go for a walk instead of reaching for junk food when energy flags boosts productivity, some firms find. Jamie Grill Photography/Tetra Images/Corbis hide caption

itoggle caption Jamie Grill Photography/Tetra Images/Corbis

Euclid Market, a corner store in East Los Angeles, recently got a makeover to promote healthier eating. It not only sells more fruits and vegetables, but also offers cooking classes and nutrition education. Courtesy of Margaret Molloy/UCLA Fielding School of Public Health hide caption

itoggle caption Courtesy of Margaret Molloy/UCLA Fielding School of Public Health

Researchers say that setting your thermostat a little lower can help you burn more calories. iStockphoto hide caption

itoggle caption iStockphoto