“In March, the USDA launched its process for the 2025 guidelines by publishing a draft list of scientific questions (no longer at its original URL), which did not include a single query on low-carb diets. If no question is asked, no review gets done, and this would mean that the guidelines would have no chance of including a low-carbohydrate option until the 2030 guidelines or later.”

https://unsettledscience.substack.com/p/usda-ignoring-the-science-on-low