Eating more plant oils like olive or soybean oil is linked to a modest reduction in deaths from heart disease, but eating more butter is not linked to higher heart disease death risk in this study, indicating plant oils may be protective even if butter isn't directly harmful for the heart.

Pro

Against

Evidence from Studies

Supporting (1)

Community contributions welcome

Butter and Plant-Based Oils Intake and Mortality.

Cohort Study

Human

2025 May 1

Contradicting (0)

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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

Butter and Plant-Based Oils Intake and Mortality.

Score: 74

DOI: 10.1001/jamainternmed.2025.0205