What’s the secret to weight loss? There is no secret.

How many calories are in a pound?

This seemingly simple question stumped me on my family medicine board recertification exam seven years ago — twice. (I think they asked the question in two different ways. I hoped they were experimental questions that didn’t count.) Later that day, I found the answer: 3,500 calories equals one pound.

I don’t remember which multiple-choice answer I chose, but I do remember choosing the same answer …

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