I can't vouch for exactly how much caffeine is in HOT-ROX, but my wife was worried about it before she started using it. She's very sensitive to caffeine.
I questioned Cy about it and while he wasn't allowed to say exactly how much was in it (because it's part of their proprietary formula) he said it wasn't much compared to a cup of coffee.
My wife originally started by taking 1 cap in the morning and after a few weeks of no bad side affects, she upped it to 1 in the morning and 1 in the afternoon. She's taking 4 a day now; 2 in the morning and 2 in the afternoon with no problems at all from the caffeine. She's been using HOT-ROX for a little over a month now.