What caffeine does to your body and brain What caffeine does to your body and brain some positive and negative effects can also improve your mood some positive and negative effects some positive and negative effects “What caffeine does to your body and brain” “What caffeine does to your body and brain” central nervous system how caffeine affects the body can also improve your mood some positive and negative effects “What caffeine does to your body and brain” “What caffeine does to your body and brain” how caffeine affects the body “What caffeine does to your body and brain” how caffeine affects the body “What caffeine does to your body and brain”