Smelling your food makes you fat

Researchers developed ways to temporarily eliminate the sense of smell in adult mice, and discovered that those mice that lost smell could eat a high-fat diet and stay a normal weight, while littermates that retained the sense of smell ballooned to twice normal weight. Supersmellers gained more weight than did normal mice on the same high-fat diet. Smell-deficient mice burned excess fat instead of storing it, suggesting a link between smell and metabolism.

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