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The original was posted on /r/tifu by /u/GooseAcademic541 on 2026-03-23 10:05:48+00:00.
Hey everyone,
this is a throw-away account because I feel incredibly stupid.
I recently saw a reddit post from a guy who drank nothing but Coke Zero for years and spent a fortune on doctors trying to figure out why he had chronic headaches, only to find out he was just severely dehydrated (or allergic to the ingredients of Coke Zero). It was a funny read for because it felt exactly like what happened to me, but with a "M" on the can.
I'm 30 now. For the last decade, Monster Energy (Absolutely zero, the blue one) was my only source of hydration. It started around age 20 with 1 or 2 of the "Zero" cans a day. By the last 3 years, it had spiraled into a minimum of 4 to 5 cans every single day-morning, noon, and night.
When I say I drank only Monster, I mean it. I would have maybe one glass of water when I woke up and one before bed if I felt particularly "dry," but for the other 16 hours of the day? Only Monster. Water wasn't even in my vocabulary. I was conditioned. It was a Pavlovian response: the moment I sat down at my computer to work or game, I needed that ice-cold can from the fridge. Nothing else tasted "right".
My brain performed Olympic-level mental gymnastics to justify this. Because I could drink a Monster at 11 PM and still fall asleep, I convinced myself I had developed a "caffeine immunity." I genuinely believed my body just didn't react to it anymore. I ignored the science and the common sense because I didn't want to give up my ritual.
For years, I've been dragging myself to doctors, frustrated because:
- I felt chronically flat and exhausted, despite being pumped full of stimulants.
- I was ashen, incredibly pale, and recently I noticed my dark eye circles were getting so bad I looked like I hadn't slept since 2014.
- I couldn't lose weight to save my life, even while being in a massive calorie deficit. My metabolism was basically stuck in a permanent "error" state.
- I'd get random heart palpitations or a racing pulse while just sitting still, which I knew came from the caffeine but still was able to ignore it.
1-2 months ago it clicked for me while I was researching my dark eye circles. I realized.. I probably wasn't immune to coffeine, I was just heavily conditioned and dangerously dehydrated / stressed. The concept of hydration and high caffeine levels were something I had pushed out of my mind for ten years just to protect my habit.
Then I finally cut back. I now limit myself to a maximum of 2 cans, and never after 3 PM. Everything else is water with lemon. It sounds so simple but it is still quite hard for me to stay away from the Monster to drink when I am thirsty. The Monster Absolutely Zero just has this nice taste I like that much, sadly there are no "no caffeine" variants available.
It's honestly fascinating (and embarrassing) how much we can manipulate ourselves just to keep an addiction going. I'm sharing this as a final "closing chapter" for myself. Hopefully, it serves as a warning, or at the very least, you can all laugh at how dumb a person can be for ten years straight.
If you have questions, feel free to ask.
TL;DR: Spent 10 years using Monster Absolutely Zero as my only fluid intake. Convinced myself I was "caffeine immune" while turning into a pale, exhausted zombie with a racing heart. Finally woke up. Turns out, I'm not immune; I was just a moron.