# Butter or plant-based oils? Food fight erupts as study cites lower risk of death from one | Fox News

## Food-Drink

### Food fight about butter? Study says subbing in plant-based oils could reduce risk of death

'Butter vs. plant oils' debate draws compelling health insights

**By**   
**Published** March 7, 2025 3:36pm EST

A greater consumption of butter has been linked to increased mortality rates – and replacing it with certain plant-based oils may help reduce the risk of death, according to a new study.

The study, published on Thursday in JAMA Internal Medicine, revealed that "substituting butter with plant-based oils, particularly olive, soybean and canola oils, may confer substantial benefits for preventing premature deaths."

Researchers analyzed the data of over 200,000 adults over a long period of time and found that replacing butter with plant-based oils was associated with an estimated 17% reduction in total mortality and cancer mortality, according to the study.



Using data collected from three cohort studies spanning 33 years, researchers assessed diets from "food frequency questionnaires" done every four years.

"Women and men who were , cardiovascular disease (CVD), diabetes or neurodegenerative disease at baseline were included," according to the cohort study.



The study was done by the Department of Epidemiology at the Harvard T.H. Chan School of Public Health in Boston along with other Boston institutions. The Department of Public Health at the University of Copenhagen in Denmark also took part.

Total mortality was the primary outcome, and mortality due to cancer and CVD were secondary outcomes, the study said.

"Deaths were identified through systematic searches of state vital records and the National Death Index, supplemented by reports from next of kin and postal authorities," the study noted. "Using these methods, we achieved more than 98% completeness in mortality follow-up for the cohorts."



Lauren Manaker, a registered dietitian in South Carolina, told Fox News Digital she's not surprised by the study results.

"We are already aware that consuming excessive amounts of saturated fats is not something that supports our health – and butter is a source of saturated fat," said Manaker, who was not involved in the new research.

## ‘Isn’t the villain’

But chef Andrew Gruel, who owns the American Gravy restaurant group in California, recently told Fox News Digital that he believes butter is better than it's perceived.

"The idea that butter is inherently bad for you comes from outdated dietary advice rooted in the mid-20th century push against saturated fats," Gruel said.



Butter, once "demonized because it is high in saturated fat, which was thought to increase  and directly lead to heart disease," Gruel said, "isn't the villain it was once made out to be."

He said that "studies, like those reviewed in a 2014 meta-analysis published in Annals of Internal Medicine, found no clear evidence that higher saturated fat increases the risk of  when you account for the overall diet."



Gruel added, "Butter's saturated fat – about 7 grams per tablespoon – does raise LDL ('bad') cholesterol, but it also raises HDL ('good') cholesterol, which can offset some of the risk. Plus, not all LDL is created equal."



Dr. Walter C. Willett, a medical doctor and professor of epidemiology and nutrition at the Harvard T.H. Chan School of Public Health in Boston, said it's a mistake to think that butter is better than conventional .

"If you want to have a heart attack, that's the right step to take," Willett, who co-authored the new study, told Fox News Digital.



Willett also said the idea that seed oils are bad "is a complete myth."

"There's no evidence to support that," he said.



Willett pointed out that it's worth noting the new study doesn't mean "somebody should never use butter."

"This doesn't mean that you have to avoid butter like it's poison," she said.

Peter Burke is a lifestyle editor with Fox News Digital.

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