The elimination half-life of any drug or substance, including steroids, is a measure of how long it takes for a 50% reduction of the steroid concentration to remain in the blood or body. Knowing the half life of a steroid you’re taking makes it easy to plan your cycles, know which steroids to use and how long you should use them for.
It will also allow you to know what’s happening in your body if you’re faced with substance testing. The half life of a steroid remains the same no matter what your dosage is or how long you’ve been using it. The following is a list of the most popular anabolic steroids and their half-lives:
| Compound | Active Half-life | Detection Time |
|---|---|---|
| Anadrol | 8 to 9 hours | 8 weeks |
| Sustanon 250 | 15-18 days | 3 months |
| Deca-Durabolin | 15 days | 18 months |
| Dianabol | 4.5 to 6 hours | 6 weeks |
| Anavar | 9 hours | 3 weeks |
| Winstrol | 9 hours | 3 weeks |
| Winstrol Depot | 1 day | 9 weeks |
| Testosterone Cypionate | 12 days | 3 months |
| Testosterone Enanthate | 10.5 days | 3 months |
| Testosterone Propionate | 3-4.5 days | 2 weeks |
| Testosterone Suspension | 1 day | 1-2 days |
| Trenbolone Acetate | 3 days | 5 months |
| Trenbolone Enanthate | 8 days | 5 months |
| Clenbuterol | 1.5 days | 4-6 days |
| Proviron | 12 hours | 5-6 weeks |
| Masteron | 3-4 days | 3 weeks |
| Halotestin | 9.5 hours | 2 months |
| Primobolan Oral | 2-3 days | 4-5 weeks |
| Primobolan Depot | 10.5 days | 5 weeks |
| Equipoise | 14 days | 4-5 months |
| Turinabol | 16 hours | 11-12 months |
| Arimidex* | 2-3 days | 2 weeks |
| Clomid* | 5-7 days | 2 months |
| Letrozole* | 2-4 days | 2 weeks |
| Nolvadex* | 7-14 days | 2 months |
Note: Clomiphene Citrate, Nolvadex (Tamoxifen), Arimidex (Anastrozole) and Letrozole (Femara) are ancillaries usually used during a post-cycle therapy (PCT).
Half life length can vary considerably between different steroid types. For example, Deca-Durabolin has a long half life of 15 days, while Winstrol has a very short half life of just 9 hours. Steroids with a longer half life take longer to withdraw from compared to those with shorter half lives.