HealthQuiet 42d · day 42
BBC review questions whether intermittent fasting's health claims hold up
A new BBC Future analysis says evidence for intermittent fasting's benefits is inconsistent and largely unproven in humans beyond modest weight loss.
What to know
- Human evidence for intermittent fasting's touted benefits (cancer risk, cognitive decline, longevity) remains far weaker than the dramatic results seen in mouse and animal studies.
- In humans, the diet appears to produce modest weight loss (about 5%), similar to other diet strategies, rather than unique or superior outcomes.
- Researchers say a core limitation across dietary science, not just fasting studies, is the inability to accurately measure what people actually eat.
- At least one study has raised concerns about increased cardiovascular risk, adding to inconsistency across the evidence base.
Krista Varady Professor of nutrition, University of Illinois at ChicagoMark Mattson Neuroscientist, Johns Hopkins University
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