Eating less saturated fat didn’t help men who already had a heart attack live longer without another heart attack.

Scientific Claim

Dietary interventions aimed at reducing saturated fat in men with prior heart disease did not significantly reduce coronary heart disease (CHD) mortality, with a risk ratio of 0.989 (95% CI 0.784–1.247) across six randomized trials.

Original Statement

“There were 207 and 216 deaths from CHD in the intervention and control groups, respectively. The RR was 0.989 (95% CI 0.784 to 1.247). There were no differences in all-cause mortality and non-significant differences in CHD mortality, resulting from the dietary interventions.”

From 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

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

definitive

Can make definitive causal claims

Assessment Explanation

The RCT-based meta-analysis provides high-quality evidence of no effect. The use of 'did not significantly reduce' is precise and aligns with statistical results and GRADE Level 1a evidence.

Evidence from Studies

Supporting (1)

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

The study found that when men who already had heart disease ate less saturated fat, their heart attacks and heart-related deaths didn’t go down — even though their cholesterol improved.

Contradicting (0)

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

In men who already had heart problems, eating less fat didn’t help them live longer, even though their cholesterol went down.

83%

Eating more saturated fat, like butter or fatty meat, doesn't seem to raise your risk of heart disease, according to a big review of 16 long-term studies of adults.

83%

The official advice to eat less fat to avoid dying of heart disease isn't backed up by the long-term studies of large groups of people.

82%

Eating more saturated fat — like in butter or red meat — doesn't appear to raise the chance of dying from heart disease, based on long-term studies of nearly 90,000 people.

81%

Eating foods with saturated fat, like butter or meat, doesn't seem to raise your risk of heart disease or dying from it, based on the studies reviewed.

79%