What Happens When You Break a Fast With Protein Instead of Carbs? | Science Explained

By How Things Work 001

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What really happens inside your body when you break a fast with protein instead of a carbohydrate-heavy meal? After an overnight or intermittent fast, your metabolism is already in a different state. Insulin is lower, liver glycogen has been used, fatty acids are more available, and your body is waiting for the next nutrient signal. The first meal changes that signal. In this video, we go inside the body to compare what happens when you break a fast with protein versus a carb-dominant meal. You’ll discover: • What your metabolism is doing at the end of a fast • How protein is digested into amino acids • Why protein can still raise insulin • How glucagon responds to a protein-rich meal • Why amino acids matter for muscle protein synthesis • The role of leucine in muscle repair and preservation • How protein affects hunger and satiety • What happens to blood sugar after a carbohydrate-heavy meal • Why carbs do not automatically turn into belly fat • How liver and muscle glycogen are repl

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