I wonder if the author's energy level issues were due to his "ever-increasing consumption".
Though I am still at maximum 1 cup per day and have absolutely no problem skipping a few days here and there. Good thing about caffeine is that it's very fast to reset back to 0.
Other caffeine sources I enjoy as well but try to stay away as much as possible and only consume very very very occasionally. Studies that link telomere length to caffeine (from non-coffee sources) are enough to make me not want to drink energy drinks at all despite me really liking the taste and boost.
From the abstract, they never say it prevent liver cancer.. but maybe that could help if you already have a big liver disease.
For the life of me at around 4pm I start to feel snoozy if I had one in the morning.
Some of the energy thing is related to dehydration I suspect - if I drink more water over the day it has same effect as stopping coffee
For me, that was the majority of it. I've settled on a 1:1 ratio. Drink a cup of coffee, then a full cup of water before I have another coffee.
Lack of hydrating is probably my worst bad habit.
What you're describing is sugar dependence, not caffiene. Cut out all processed sugar and after 2 weeks you'll wonder what drug you are on (then cut out "healthy" carbs like bread and pasta and you'll wonder how you ever wanted to eat them).
When I drink coffee at night, which is rare, I also don't have any trouble falling asleep.
I'm the author. Apparently caffeine affects people in different ways.