Multi-Day Fasting Experiment

By the end of day 3, the subject's GKI reached 0.8, which the article describes as well inside the maximum autophagy range. The subject entered the optimal therapeutic zone within day 1 because of pre-existing insulin sensitivity and a low-carb baseline. The described fast began as a strict water fast with water and black coffee and no calories. Small amounts of avocado and sour cream on days 4 and 5 maintained about a 1:1 glucose-to-ketone ratio when protein stayed very low. Significant hunger and lightheadedness near the end of day 3 prompted refeeding.