HB 1637 introduces two key prohibitions related to health and safety at primary and secondary schools in Texas. First, it prohibits the use of herbicides containing glyphosate on school grounds, with an exception for high schools where glyphosate may be used for agricultural curriculum or research purposes involving crop production. Second, it bans the inclusion of specific food additives in meals provided by school districts or open-enrollment charter schools. These banned additives include artificial food dyes such as Blue 1, Blue 2, Green 3, Red 40, Yellow 5, Yellow 6, and any substantially similar substances. The Act applies beginning with the 2025-2026 school year.