Full Circle on What’s Best to Eat | The New York Times

To the Editor: 

It is unfortunate that Nina Teicholz throws out the methodological baby with the policy bathwater.

She is right that we have not been served well by policy making that has been enamored of compelling but probably unsound dietary advice. But epidemiologic data is not the culprit. Observational studies can yield insights that guide causal inference as much as experimental studies can.

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