The School of Greatness with Lewis Howes

Every diet you've ever tried has failed you for one reason: it never told you when to eat. Your body runs on two energy systems. One burns sugar. The other burns fat. Most people never spend a single day in the second one. Around eight to ten hours without food, the switch flips. Ketones flood your brain. Hunger quiets. Mental clarity hits. Healing turns on. This is what fasting expert Dr. Mindy Pelz has been teaching for over 25 years, and what her book Fast Like a Girl made impossible to ignore. For women, timing is everything. Day 1 to 10, fast longer and lift heavier. Day 11 to 15, testosterone surges and libido climbs. Day 16 to 19 is for deeper fasts. After day 20, progesterone needs you to back off and rest. Fast like a man during the back half of your cycle and you'll tank the very hormones keeping you calm and regular. Underneath all of it sits the hormonal hierarchy. Oxytocin at the top. Cortisol below it. Then insulin. Then sex hormones. When you feel safe and connected, the whole stack works. When