John P. A. Ioannidis on Observational nutrition studies are too…

John P. A. Ioannidis

Physician-scientist and meta-researcher at Stanford University, known for work on the reliability of scientific research

These implausible estimates of benefits or risks associated with diet probably reflect almost exclusively the magnitude of the cumulative biases in this type of research, with extensive residual confounding and selective reporting.

AI Verified (Aug 23, 2018)

Source:

John P. A. Ioannidis, Stanford, JAMA Viewpoint, "The Challenge of Reforming Nutritional Epidemiologic Research"

3mo ago

Policy proposals and claims

Observational nutrition studies are too confounded to show whether eggs cause harm

votes For

Statement relation verification history AI Verified Report this

AI Verified In source context, Ioannidis explicitly discusses an observational finding that eating 1 egg daily would cut life expectancy, then argues that such diet-risk estimates largely reflect cumulative bias, residual confounding, and inadequate cohort data for causal inference. So even though the stored quote is general, it is directly tied to whether observational nutrition studies can show egg harm and gives a determinable stance signal. ([statmodeling.stat.columbia.edu](https://statmodeling.stat.columbia.edu/wp-content/uploads/2018/08/jama_Ioannidis_2018_vp_180095.pdf)) · YouCongress gpt-5.4-2026-03-05 · 3mo ago

Vote inference verification history Latest opinion AI Verified Report this

AI Verified The quote strongly supports the statement: Ioannidis says the reported diet "benefits or risks" in this research type likely reflect "extensive residual confounding and selective reporting" rather than true causal effects. In context, the article is criticizing nutritional epidemiology for treating associations as causal, so the inference to foods such as eggs is strong even though eggs are not named in the quote. ([jamanetwork.com](https://jamanetwork.com/journals/jama/fullarticle/2698337)) · YouCongress gpt-5.4-2026-03-05 · 3mo ago

Quote authenticity verification history

Report this

AI Verified ai_verified · YouCongress gpt-5.4-2026-03-05 · 3mo ago

replying to John P. A. Ioannidis

Other opinions from John P. A. Ioannidis

See all

John P. A. Ioannidis votes For

Observational nutrition studies are too confounded to show whether eggs cause harm

Moreover, given the complicated associations of eating behaviors and patterns with many time-varying social and behavioral factors that also affect health, no currently available cohort includes sufficient information to address confounding in nutrit...

more AI Verified source (Aug 23, 2018)