Back in the late 00’s I discovered Redbull really helped me overcome after-lunch food-coma. I’d drink one right after lunch to help me get back to work and focus for the rest of the day.

After about 6 months of this, one day I was sitting at my desk having just finished my afternoon Redbull, and felt my heart skip a beat, literally. Like a little mini-heart attack. Scared the shit out of me, and I quit Redbull cold turkey that day.

At the time I was really into cycling, riding about 100 miles per week (50 on the weekend plus daily bike commute). I was in tip-top shape, with no family history of heart problems, and an otherwise normal, low-sugar, whole food diet.

Never experienced that since, and I wouldn’t be surprised if there are studies that find a link between super-high caffeine energy drinks and heart or other health problems.