This 30 minute video from Dr Alex is particularly interesting. For years I struggled with my sleep, though now I generally sleep pretty well most nights — The Most Overlooked Longevity System in Your Body:
Did you know your brain runs its own cleaning cycle every night, and that the quality of your sleep decides how much of that waste actually gets cleared? This drainage network, together with the wider lymphatic system, could be one of the most underrated parts of brain health, dementia prevention and healthy ageing.