I had similar experience my friend. I brewed my Testosterone Enanthate obeying every possible rule in the book including precise sterilization. Your testostero Enth may be legit and dosed properly, but the problem could be acid used in production of test enanth raw powder . Normally that acid should be separated from powder before it can be used. However, to save money or time manufacturers, usually from China, don't bother them self with that. There is a way to separate it but you will have to google it.