About The Study: In this cohort study, higher intake of butter was associated with increased mortality, while higher plant-based oils intake was associated with lower mortality. Substituting butter with plant-based oils may confer substantial benefits for preventing premature deaths.
Corresponding Author: To contact the corresponding author, Dong D. Wang, MD, ScD, email dow471@mail.harvard.edu .
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(doi:10.1001/jamainternmed.2025.0205)
Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.
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Media advisory: The full study and commentary are linked to this news release. This study is being presented at the American Heart Association EPI/Lifestyle Scientific Sessions 2025.
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JAMA Internal Medicine