In the past, people noticed that countries where people ate more fat also had more breast cancer and heart disease, but later studies on individuals didn’t prove that eating more fat actually causes those diseases.

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Evidence from Studies

Supporting (1)

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Dietary fat, coronary heart disease, and cancer: a historical review.

Narrative Review

2006 Nov

Scientists once thought countries that ate more fat had more breast cancer and heart disease, but when they looked at individual people over time, they found no real link — and this study confirms that.

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Dietary fat, coronary heart disease, and cancer: a historical review.

Score: 1

DOI: 10.1016/J.YPMED.2006.07.013

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