Cutting Butter Doesn't Save Hearts, Study Finds
Saturated Fat Restriction for Cardiovascular Disease Prevention: A Systematic Review and Meta-analysis of Randomized Controlled Trials
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Reducing saturated fat had no measurable impact on heart attacks or death — even when people stuck to the diet for years.
For 50+ years, public health guidelines have pushed saturated fat reduction as a cornerstone of heart health — this study says the RCT evidence doesn’t support it.
Practical Takeaways
Don’t stress about eliminating butter or cheese if you enjoy them — focus instead on overall diet quality, like eating more veggies and less processed food.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Reducing saturated fat had no measurable impact on heart attacks or death — even when people stuck to the diet for years.
For 50+ years, public health guidelines have pushed saturated fat reduction as a cornerstone of heart health — this study says the RCT evidence doesn’t support it.
Practical Takeaways
Don’t stress about eliminating butter or cheese if you enjoy them — focus instead on overall diet quality, like eating more veggies and less processed food.
Publication
Journal
JMA Journal
Year
2025
Authors
Satoru Yamada, Tomomi Shirai, Sakiko Inaba, Gaku Inoue, Minami Torigoe, Naoto Fukuyama
Related Content
Claims (6)
Eating lots of saturated fat doesn't always lead to heart disease—it depends on what you eat instead. If you swap it with healthy foods, you might be fine, but if you swap it with junk food, it could be worse.
Eating less saturated fat—like butter or fatty meats—doesn’t seem to lower the risk of dying from heart problems or other causes, even after years of doing it, according to a review of nine big studies.
Most of the old studies on cutting saturated fat were done on older men who weren’t taking cholesterol meds, so we can’t be sure the results apply to today’s diverse patients who often take medication to lower cholesterol.
Cutting back more on saturated fat doesn't seem to give you extra protection against heart problems—whether you cut a little or a lot, the benefit stays about the same.
The studies that looked at whether cutting back on saturated fat is healthy are all kind of sloppy—they didn’t plan ahead properly, and none were done well enough to trust their results.