If youre more worried about red bull than dbol, you dont understand what you're taking. they’re both fine for a healthy male to take at the same time, BP is always a factor when using AAS, especially dbol, adding a couple hundred grams of caffeine to the mix is not a wise choice no matter who you are, but its done everyday by millions of people, nobody ever knows when tis the last redbull/dbol combo they’ll take... I take a vaso dilator and a noopept rather than caffeine which has the reverse effect on your veins and that is not what you want.