: Reports document that the plasma elimination half-life of testosterone cypionate after intramuscular injection is around 8 days. This means that it’ll take slightly over a week to eliminate 50% of the exogenous testosterone from your system. Knowing this, we can estimate that it’ll take around 44 days (6.29 weeks)
to have fully eliminated exogenous testosterone cypionate from your system. Testosterone cypionate is known to stay in a user’s system for a considerably longer duration than enanthate and propionate esters.
Full Article: How Long Does Testosterone Stay In Your System?