Blood tests for fruit and vegetable nutrients are better at predicting diabetes risk than asking people what they ate, because people often misremember or misreport their diet.
Scientific Claim
Plasma biomarkers of fruit and vegetable intake are more strongly associated with type 2 diabetes risk than self-reported dietary questionnaires, offering a more accurate method to assess dietary patterns in large population studies.
Original Statement
“Previous research studies have typically used dietary food frequency questionnaires to assess fruit and vegetable intake, which are subject to measurement error and recall bias. Circulating plasma vitamin C and carotenoids have been proposed as objective biomarkers of fruit and vegetable intake...”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim is descriptive and based on the study’s stated rationale and methodological justification. It does not overstate causation and correctly frames biomarkers as a more accurate tool.
Evidence from Studies
Supporting (1)
Unknown Title
Scientists measured chemicals in people’s blood that come from eating fruits and veggies, and found those with higher levels were much less likely to get type 2 diabetes — even more accurately than people’s own memories of what they ate.