Under conditions of prolonged food deprivation, fat can be converted into glucose and a secondary form of fuel, called

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When the body is deprived of food for a prolonged period of time, it may start breaking down stored fat into molecules called ketones, which can then be used as a secondary source of fuel. This process is known as ketogenesis. While glycogen is also a form of glucose storage in the body, it is typically depleted within the first 24 hours of fasting. Fatty acids are the primary building blocks of stored fat, and they can be broken down during prolonged fasting, but they are not converted directly into glucose. Glucagon is a hormone that helps regulate blood sugar levels, but it is not a form of fuel.

Under Conditions of Prolonged Food Deprivation, Fat Can Be Converted