I have been a caffeine user ever since I graduated from college 6 years ago and got a boring job (like most people I suspect). I spend about 8.5 hours in bed per night, but that is typically interrupted by a 2 year old. I work an 8-5 desk job with almost no physical activity during working hours. I started with coffee as needed, but recently I found my wakefulness to be erratic when consuming ad lib. To try to get a better handle on the situation, I switched to caffeine anhydrous tablets and have begun measuring and timing my doses.
I find that 300mg shortly after waking is enough to give me the alertness I desire, and I usually require another 100-200mg in the early afternoon if I really want to finish strong (this second dose also serves as my pre-workout on training days). I have tried lower doses and they just don’t cut it.
Is there anything dangerous about my current daily amounts?
Is there an upper limit of safe caffeine consumption?