What exactly is “pre-workout”? I work out fasted but I keep seeing people talk about this. When I just googled a little I found one with this warning ‘Contains 274 mg of caffeine per serving or about as much caffeine as two and a half cups of coffee.” So it’s just caffeine with some vitamins and protein powder?
What exactly is “pre-workout”? I work out fasted but I keep seeing people talk about this. When I just googled a…