Do you think your morning coffee affects how you sleep at night?

Research suggests caffeine's effect can last long enough — depending on individual sensitivity — that even a morning coffee may worsen your night's sleep quality.

• Yes, I feel the effect, so I consciously limit my coffee
• Maybe it does, but I don't worry about it
• I don't think it affects me at all, I can drink coffee anytime
• I don't drink coffee in the morning anyway