Editorial still-life of a glass bottle of golden extra virgin olive oil with olives and an olive branch sprig, styled with a small dish of butter on a cream stone surface, in deep olive and lime tones

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Two Decades, 121,000 People: What Harvard Found When Olive Oil Replaced Butter

A 20-year Harvard study of 121,000 people found that swapping butter for olive oil was linked to less long-term weight gain than any other fat substitution t...

10 September 2026 Chris Averill

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