Lead author Michelle Barrack and principal investigator Adam S. Tenforde discuss the first investigation into the prevalence of dietary supplement and sport food use in male and female middle school-aged runners. Researchers found that almost half the study participants used these products on two or more days a week during the prior year. Characteristics associated with supplement use included a prior bone stress injury, following a vegetarian diet and behaviors suggesting dietary restrictions such as losing weight and skipping meals. (https://doi.org/10.1016/j.jand.2021.07.013)