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Fast Burn!: The Power of Negative Energy Balance

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A motivational diet plan to blast fat—and keep it off—by Ian K. Smith, M.D., the #1 New York Times bestselling author of Clean & Lean.

New York Times bestselling author Ian K. Smith, M.D.’s unique new plan takes intermittent fasting to the next level, combining the power of time-restricted eating with a detailed program that flips the body into a negative energy state, scorching fat on the way to weight loss and physical transformation.

Many IF books leave readers to figure out what and how m...