Headed to the beach this summer? Take some sanitizer.

The next time you build a sand castle, wash your hands. 

A study in the American Journal of Epidemiology found that people who dig in the sand are more likely to get sick. Tests of some sandy beaches found more E. coli bacteria in the sand than in the water or the public bathroom. Kids who like to bury themselves or each other in the sand are most at risk. They were the most likely to come down with a stomach bug within a few days of their day at the beach.

Hand sanitizer is a good idea after digging in the sand, but thoroughly washing with soap and water is even better, especially before eating your picnic lunch.