
Butter linked to Cancer: Large Studies Reveal the Hidden Cost
Physionic
3 nov 2025
Mindsip insights from this episode:
Limit butter consumption to reduce cancer mortality risk
A 33-year study of over 200,000 people found that the highest butter consumption was linked to an estimated 12% increased risk of dying from cancer.
Limit butter consumption to reduce mortality risk
Even after researchers adjusted for refined bread consumption, the statistical link between adding butter to food and mortality remained.
Use butter wisely to manage mortality risk
Using butter for baking and frying was not associated with increased mortality risk, whereas adding butter directly to food like bread was.
Eliminate trans fats from butter category for accurate health insights
The study's 'total butter' category was contaminated with margarine blends, which contained harmful trans fats during the early data collection period.
Recognize ketogenic diets as unique physiological contexts
These findings on butter do not apply to ketogenic diets, as being in a ketogenic state is an objectively different physiological context.
Address butter's cancer risk in overweight individuals
The negative effects of butter on cancer may be a bigger problem in an 'obesogenic environment,' meaning for overweight individuals.
Understand butter's role in cancer mortality, not occurrence
The data links butter to cancer mortality (dying from it), not cancer occurrence (getting it), suggesting it may only be a detriment once cancer is already present.
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