Glucose or fructose. In glycolysis, glucose is oxidized to be pyruvate.
This statement is true if that is the question
The brain's suprachiasmatic nucleus regulates the body's circadian rhythms. The suprachiasmatic nucleus is a minute region of the brain located in the hypothalamus above the optic chiasm, the circadian rhythm is the 24-hour cycle of organisms, related to sunlight and temperature.