Part 3/10:
When you eat, blood glucose and insulin levels spike, initiating metabolic processes geared toward digesting and storing nutrients. Conversely, fasting reduces these levels, activating hormones like GLP-1 and promoting lipolysis (fat breakdown). Huberman underscores that these processes do not happen instantaneously; they unfold over time, emphasizing that the mere act of eating or fasting influences the body's internal environment over hours.