title_body: What are the effects of caffein olfaction?
upvoted_answer: From Time Magazine's You Can Now Inhale Caffeine Instead of Drinking It article: 
  
  
    Forget coffee and energy drinks—now you can inhale your caffeine. ...
       Each inhaler boasts a pretty small amount of caffeine, which the
       company says comes from natural sources like guarana, taurine, and
       ginseng (stimulants that are also common among energy drinks).
  
  
  Since it can be absorbed into your body (nasal, oral mucosa and lungs), there would be a neurological response, hopefully positive.