I take it fasted in the morning drink some water and wait for it to kick in then do cardio. Idk if I'd lift fasted, just never tried before so idk how much it would effect my strength and everything. Cardio is one thing but lifting takes a lot more effort. I've known of a few people who do but it's not a big thing. I'd rather eat a small meal pre workout and take it so my workouts don't suffer from training on an empty tank, it's definitely catabolic too.

Fasted is best for eca and cardio. Lifting weights fasted is not.