Testosterone Cypionate & Supplement Test Boosters

I’ve been injecting .5cc twice a week for 15 months. Prior to that I used some test boosters but with no where near the results I’ve seen lately.
Would there be a benefit to add a Test Booster product while injecting?
Or would it be useful to take a test booster when cycling off the drug?
I also cycle Tamoxifen 2 weeks on and 2 weeks off to keep Estrogen in check.

No, it won’t help, and could lead to other problems with E2. A lot of test boosters actually just lower E2. And with true TRT, you don’t “cycle” off. Once you’re on, you’re on.