DHB, like Primo, can take a little bit to “kick” but you’ll know it when it does. Vascularity will start to increase, it’s a bit thermogenic so you’ll start to sweat a bit more and your muscular endurance keeps you rockin through each workout longer and longer. It’s a great compound man. Especially since it’s near PIP free you can take it as high as you want. I ran it at 600mg easy. I’d like to try it someday at low test, 700 DHB/700 Primo and run it out for 16 weeks. That would be a nice lean cycle