The reassuring “moderate drinking is good for you” story has quietly collapsed — and for the brain specifically, no safe level has been found. But that’s not the same as “one glass causes dementia.” Here’s the honest, non-alarmist update: what heavy and moderate drinking each do, how worried to actually be, and the everyday sleep cost most people overlook.
Cortisol has become the internet’s favourite villain — but the science tells a more useful story. Cortisol is essential, acute stress is adaptive, and it’s chronic stress that carries the real brain cost. Here’s what prolonged stress does, how worried to actually be, why “cortisol detox” is a trap, and what genuinely helps.
Waking takes information in; sleep makes it stick. What deep sleep does for memory, the key experiments, and why you can’t learn new facts asleep.
