What is the body's primary fuel source during fasting?

Name: What is the body's primary fuel source during fasting?
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Question

Quizplus · Accepted Answer

During fasting, the body's primary fuel source shifts from glucose to fatty acids as the body begins to break down stored fat for energy. Amino acids may also be used for energy, but this is a secondary source after fatty acids. Ketones are produced when the body switches to using fat as its primary fuel source, but they are not the primary fuel themselves.

What Is the Body's Primary Fuel Source During Fasting