Question: how long does it take to get into ketosis dry fasting?
Answer: After an overnight fast, ketone body concentrations can reach about 0.1 - 0.5mM—just below the official “ketosis threshold”. However, fasting for around 48 hours can elevate circulating ketones to around 1 - 2mM, and after 5 days, levels might reach 7 - 8mM.