Research
Energy balance
The fraction of available calories from protein in the US food supply has decreased by ~1% since the early 1970s.
Awareness of changes in dietary composition over time is important for nutritional guidance.
StrongSupportsmedium confidence
the fraction of available calories from protein has decreased by ~1% due to greater increases in available carbohydrate and fat.
Why this rating
The claim is based on data from food balance sheets.
Source
The potential role of protein leverage in the US obesity epidemic
Kevin D. Hall · 2019
DOI 10.31232/osf.io/59x87
otherCited 1×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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