Caffeine and Sleep.

How much coffee did you have today? Are you expecting to sleep well tonight? This paper on Caffeine and Sleep shows how individualised the effect of caffeine can be to different people in terms of how it can disrupt sleep. After a recent 14-day hiatus from caffeine (and sugary drinks) I've pretty much convinced myself that I've become less "tolerant" on my usual caffeine intake (from coffee, tea and chocolate) such that I have consistent trouble sleeping. This I can attribute to my obedient non-consumption of caffeine during my pregnancy on to breastfeeding months. When I finally went back to drinking caffeine (tea first then slightly on to coffee) when I returned to work, I've become sensitive to how much I can drink and it really affects how much sleep I get through the night. How much caffeine I can tolerate, I can't really tell at this point without further subjecting myself to rigorous experimentation. However, plain to say that I should limit caffeine to coffee sips, if any at all.