For how we live.
A short nap does not wreck most people's night sleep, and can help offset sleep debt. The evidence that gives pause is about long naps: naps of 60 minutes or more track with worse cardiovascular outcomes.
Using 245,388 genomes from the US All of Us programme, researchers built risk scores for 32 traits. More diversity helped prediction in under-represented groups — but a bigger sample was not always better.
Across 89,573 accelerometer-monitored adults and 678 conditions, no disease showed a significant difference between activity concentrated in one or two days and activity spread through the week.
A UK Biobank analysis broke ultra-processed food into 37 specific ingredients rather than treating it as one block. Flavours, colourings, sweeteners and sugars carried the signal; processing aids and added fibre did not.
A Lancet study across 547,000 adults and 925 infectious diseases finds obesity raises the risk of severe infection across almost every pathogen type. The global estimate rests on modelling, not on the cohorts themselves.
A UK Biobank analysis of 96,365 people found a dose-response relationship between lifetime night-shift exposure and cardiovascular-kidney-metabolic disease — amplified in those who also slept short.