During rest, the body derives a little more than half of its energy from:

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During rest, the body relies more on fatty acids for energy than on glucose or glycogen. Amino acids are not a significant source of energy during rest. During rest, the body relies on the breakdown of fatty acids from adipose tissue as a major source of energy. This allows for the preservation of glucose reserves for use in the brain and red blood cells, which require glucose as their primary fuel source. Glycogen is a storage form of glucose and is only broken down when glucose levels are low, such as during exercise or fasting. Amino acids are typically utilized for protein synthesis, and their breakdown for energy is typically a last resort used by the body during prolonged fasting or starvation.

During Rest, the Body Derives a Little More Than Half