Complex sentence: During the initial stages of this process, blood glucose levels are maintained through gluconeogenesis, and the adult brain does not burn ketones; however, the brain makes immediate use of ketones for lipid synthesis in the brain.
Split into simpler sentences: During the initial stages of this process, blood glucose levels are maintained through gluconeogenesis, and the adult brain does not burn ketones. However, the brain makes immediate use of ketones for lipid synthesis in the brain.