title: Why coffee perks people up.  A large study suggests the caffeinated version may boost mood.
mesh_terms: D000339:Affect / Q000187:drug effects*; D002110:Caffeine / Q000008:administration & dosage*; D002318:Cardiovascular Diseases / Q000517:prevention & control; D000697:Central Nervous System Stimulants / Q000008:administration & dosage*; D003069:Coffee; D003863:Depression / Q000517:prevention & control; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male
chemical_list: D000697:Central Nervous System Stimulants; D003069:Coffee; D002110:Caffeine