I dunno, but I put 3x of those high5 tablets i my camelback the other day after feeling a bit lethargic the day before and putting it down to low electroloytes (I’d drunk, eaten and rested enough, but I was peeing like a racehorse).
Got about 20 miles into the loop (without having to stop every 20min to pee and with plenty of energy) and realized they were the caffeinated ones. Kind of like the alertness of drinking many espressos in quick succession, but without the buzzing feeling as it was built up over 3 hours. I’ll stick to the plain ones from now on!
Back on topic, dangerously over hydrating is probably difficult, but running low on electrolytes seems to have as much an impact on my performance* as being dehydrated does.
*relative, I’m not Wiggins