The Healthy, Hunger-Free Kids Act (HHFKA) of 2010 changed school nutrition standards significantly, and a recently published study reveals it likely helped reduce childhood obesity nationwide.

The 15-year study, published in JAMA Pediatrics this February, followed 14,121 youths aged 5 to 18 from January 2005 to March 2020 and found a significant decrease in annual body mass index (BMI) across ages and income levels...