You change anytime. You can even which esters during a cycle. I've done it. Many have.I'm currently having some issues with this brand of steroids and I think that it's underdosed. I want to switch to a different one to see if there's a change.
I was wondering if it was okay to change the source in the brand of testosterone I was using early in the cycle or should i just finish the cycle and go to pct?
Right now I'm on 600 mg a week of testosterone