Derailed82
Member
From what I've read most of these are the full life's of the esters. Like everything, I'm sure there is a lot of conflicting information. I've also found a resent study where they have changed several of the half life's and most of them dropped significantly aside from Test U, which went up by 4 days.My understanding of steroid esters active drug half life
Acetate 3 days
Propionate 4.5 days
Phenylpropionate 5.5 days
Decanoate 8-12 days
Hexanoate 9 days
Enanthate 10.5 days
Octanoate 12 days
Cypionate 12 days
Nonanoate 13.5 days
Undecylenate 14 days
Undecanoate 23.5 days
Also the carrier oil (Castor, MCT etc.) has an impact on absorption and consequently on half life.
e.g: Testosterone undecanoate half-life is 21 days in tea seed oil while its elimination half-life is 33 days in castor oil.