Low-fat diets are one of the biggest nutrition mistakes in history. Fueled by Ancel Keys’ flawed research, they led to more obesity, diabetes, and heart disease — not less.
Back in the 1970s, fat became the enemy. Food companies rushed to make everything “low-fat” or “fat-free”, from yogurt to cookies to margarine. But there was a catch: all that missing fat was replaced with sugar and starch.
The myth began with scientist Ancel Keys and his famous Seven Countries Study. But here’s the truth: Keys cherry-picked data that fit his theory linking fat to heart disease — while ignoring countries that didn’t match his narrative. The result? A global nutrition shift that pushed millions onto the wrong path.
And the consequences were devastating: obesity rates skyrocketed, diabetes soared, and heart disease didn’t decline — it got worse.
In this episode of the Dr. Gundry Podcast, Dr. Gundry uncovers the truth behind the low-fat craze and explains why he eats a high-fat, low-sugar, plant-heavy diet today. Discover why fat is not the enemy — and how to make smarter choices for long-term health and vitality.
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