Elizabeth has been fasting for 4 days in observance of her religious beliefs. You note that her breath smells "fruity." This is most likely due to which of the following occurrences?

Question

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During fasting, the body shifts from using glucose as its primary fuel to breaking down fatty acids for energy. This metabolic state is known as ketosis, and it results in the production of ketones, including acetone, which can give the breath a fruity odor. The other options (A, B, and D) are unlikely to cause fruity breath odor during fasting.

Elizabeth Has Been Fasting for 4 Days in Observance of Her