You can’t supplement or exercise your way around poor sleep, and the damage accumulates faster than most people realise. A landmark Harvard study showed healthy young men developed pre-diabetic metabolic markers after just one week of restricted sleep, while a 25-year investigation of nearly 8,000 people linked chronic short sleep in midlife to a 30% increased dementia risk decades later. What would change if you treated sleep as the foundation of optimisation rather than the obstacle to productivity?