If you have kidney issues, I'd be staying the hell away from pre-workouts. I doubt they're more effective than having a strong coffee 30min before.
I dont believe i have kidney issues, but i might have liver high enzymes based on my last blood test.
which specific ingredient is bad for liver in preworkouts? thanks
There's so many substances in one hit that it's impossible to isolate any that might cause you trouble. Moreover, the supplement formulations are unregulated, so the ingredient that might damage your organs may not even be on the label. For example, your supp says 'natural and artificial flavours'....what are they exactly? That's a problem for lots of processed foods of course.
If you do have previous signs of liver damage from when you weren't training, and you want to double-dose the pre-workout, you'd want to be having regular blood tests just to show that your blood markers are stable and that it's safe. Major hassle. At least with caffeine tabs or coffee, you know the active ingredient and its safety range. Plus, as LBSS says, the cost/benefit ratio is way out compared to cheaper alternatives.
