Yes not gonna pull it but there's data that shows calories got meaningfully cheaper and easier to access in the United States and more plentiful from the 1980s to the 2020s.
https://www.ers.usda.gov/amber-waves/2020/november/average-s...
There were a ton of programs after WWII to improve the nutrition of the country. This largely meant raising calories to prevent malnutrition. And the 80s are as good a point as any other to where that succeeded.