Peter Attia· MD
now it's hard because the ambient may not necessarily change much of what's going on under the covers but it's the reason that most people when they wake up they would like hot drink even sometimes in the summer because the hot drink for the most part some people are just using caffeine and that's what they think keeps them awake but some of that benefit of the caffeine is actually not caffeine it's just the hot drink itself that is helping bring back up the core body temperature that makes you feel more awake