"Good Calories, Bad Calories" is a book by Gary Taubes. It breaks down the tricky subject of diet and health. It challenges what we believe about fats and carbs. Taubes looks at past dietary advice and the science that shapes it. He alleges that several beliefs about nutrition might be wrong or not fully proven. Taubes presents data suggesting that dietary fat, especially saturated fat, might not be harmful as thought before. But, eating lots of refined carbs could be linked to obesity, diabetes, and heart disease. "Good Calories, Bad Calories" sparked debate among scientists and the public. It changed how some people understand nutrition. It also added to the discussion on the best diet for human health.