George Davey Smith | Mendelian Randomization - what it was, what it is, and what it should become

Yassin Asfour on Instagram: "A large study using UK Biobank data looked at more than 378,000 adults and found that people with a genetic tendency to take regular daytime naps had slightly larger total brain volume—roughly equivalent to a brain that looks a few years “younger” on scans. The method (Mendelian randomization) helps separate cause from coincidence, suggesting that short, consistent naps may play a small protective role in brain aging. The effect on short-term cognitive tests was mode