A new federal estimate shows a rise in prediabetes among American adolescents, a finding that is spurring concerns about the health of U.S. children — and the way Trump administration health officials are conducting research and communicating information, experts said. In 2023, nearly 1 in 3 U.S. youngsters ages 12 to 17 had prediabetes, according to recently released data from the U.S. Centers for Disease Control and Prevention. That is far higher than a previous estimate that the condition affects about 1 in 5 kids.