Why Count Calories?

If counting calories isn’t the key to weight loss because calories from fat, protein, and carbohydrates are treated differently in the body, what is? I know that carbohydrates cause a spike in insulin, which results in storing calories as fat. Aren’t excess fat and protein calories also stored as fat? If so, why does it matter where your calories come from?

Source: Dr. Weil Q and A - January 12, 2016 Category: Consumer Health News Source Type: news