A new study has found schools have made improvements on the amount of junk food kids can purchase in vending machines.

According to Reuters, the Centers for Disease Control and Prevention surveyed the principals of middle and high schools in 40 states. In 2008, 63 percent reported that they limit the soft drinks available to students. That’s an improvement from 38 percent limiting them in 2006.

There have been a host of federal and local laws proposed to help curb poor food choices in schools. The CDC says the number of states with nutrition standards for foods outside of school meal programs increased from six to 27 in the past five years.

It’s estimated that 16 percent of U.S. children and young adults aged 2 to 19 are obese.

According to the CDC, childhood obesity is associated with various health-related consequences, including high blood pressure, elevated cholesterol levels, asthma and sleep apnea. Obese children and adolescents may experience immediate health consequences and may be at risk for weight-related health problems in adulthood.

A healthy, nutritious diet, along with plenty of exercise is the best way to fight obesity at any age.