Testoxyl Enanthate 400

Testoxyl Enanthate 400 is used primarily in advanced performance and bodybuilding cycles as a testosterone base compound. Due to its high 400 mg/mL concentration, it is often used by advanced users running higher weekly doses with reduced injection volume. It may also be used in TRT under medical supervision.

The active compound is the same (Testosterone Enanthate). The difference is concentration: 400 mg/mL vs Testoxyl Enantahte 250 mg/mL. The higher concentration reduces injection volume but may increase injection discomfort for some users.

It has a half-life of about 4–5 days and can remain active for 2–3 weeks after the last injection. Detection windows may extend longer depending on usage and metabolism.

Common usage ranges from 400–600 mg/week for intermediate users, split into 2 injections per week to maintain stable blood levels.

Initial effects may appear within 2–3 weeks, with full performance benefits typically noticeable by weeks 4–6.

Yes. PCT is generally required after use at performance doses to help restore natural testosterone production.

Sustaxyl 350 contains multiple testosterone esters for fast and sustained release, while Testoxyl Enanthate 400 uses a single long ester for more stable release and simpler dosing.

Both are very similar long-acting testosterone esters. Cypionate has a slightly longer half-life, but most users experience nearly identical results.

Yes. Possible side effects include water retention, acne, hair loss acceleration, hormone suppression, and changes in cholesterol or hematocrit levels.

It is injected intramuscularly into the glutes or thigh using a 23–25G needle. Warming the vial can reduce injection discomfort.