The diets tested in the studies weren’t even the same as the official government advice — they were different and less strict.

Pro

Against

Evidence from Studies

Supporting (1)

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Evidence from randomised controlled trials did not support the introduction of dietary fat guidelines in 1977 and 1983: a systematic review and meta-analysis

Systematic Review With Meta-Analysis

Human

2015

Before 1983, scientists didn’t test the exact fat rules they later told people to follow — they tested looser changes like eating more vegetable oil, so the rules were made without solid proof.

Contradicting (0)

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No contradicting evidence found

Source Study

Evidence from randomised controlled trials did not support the introduction of dietary fat guidelines in 1977 and 1983: a systematic review and meta-analysis

Score: 68

DOI: 10.1136/openhrt-2014-000196

Similar Assertions

None of the studies said, 'Eat less fat to live longer' — in fact, some warned it might not help or could even be harmful.

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Before the government told everyone to eat less fat, no study had actually tested whether eating exactly that much fat helped people live longer.

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