Does anyone out there if some people process caffeine more efficiently than others? I speak as someone who gets the jitters from a thimbleful of ordinary coffee (say a half espresso sized cup), and palpitations from a standard sized cup. I'm breastfeeding and have found that the baby screams like a banshee and twitches if I have a tiny amount. I've also found that it makes me stink. It's definitely been worse since I had children, and even worse when my thyroid started misbehaving. If I have any amount of coffee after noon, I can guarantee a sleepless night. It's just unfair! I love coffee, but can never drink it now.
I have friends who can drink oodles of coffee without any side-effects; my own son seems to be able to drink coffee at bedtime and still sleep. My grandmother claimed it sent her to sleep (wtf?? it's a stimulant!).
So what's the deal here?