Research
Energy balance
Most people cannot accurately estimate portion sizes of commonly consumed foods.
Practitioners should consider that clients may struggle with portion size estimation.
StrongSupportsmedium confidence
Research indicates that most people cannot accurately estimate portion sizes of commonly consumed foods.
Why this rating
The claim is supported by multiple studies referenced in the abstract.
Source
Variation in Perceptions of a ‘medium’ Food Portion
Lisa R. Young et al. · Journal of the American Dietetic Association · 1998
DOI 10.1016/s0002-8223(98)00103-5
otherCited 58×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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