Description
Supertest 450 is a highly concentrated testosterone mixture typically composed of six different esters, distributing the pharmacokinetic profile across short, medium, and long half-lives. A common split contains Test Acetate, Propionate, Phenylpropionate, Cypionate, Enanthate, and Decanoate - total concentration around 450mg per ml.
Per study reports the six-ester format delivers an extended-release profile with particularly smooth steady-state values. The short esters (Acetate, Propionate) flood in quickly, the medium ones (Phenylpropionate, Cypionate, Enanthate) carry the main load, the Decanoate anchor extends the action duration to 14-21 days.
Compared to Sustanon 250, Supertest 450 has two advantages for high-dose anabolic research: lower injection volume per dose unit and smoother plasma level profiles through multiple esters. The disadvantage: individual ester pharmacokinetics aren’t characterized in the same detail as standard compounds like Cypionate or Enanthate, since six-ester mixtures are relatively recent formulation developments.
As with all mix formats: mid-cycle adjustments are difficult through the long esters (Decanoate, Enanthate) to control. Research protocols with Supertest are typically planned long-term.
You can order Supertest 450 as an oily injection solution in 10-vial packs at 450mg/ml.
This information is for research and educational purposes only. No medical recommendations.
Risks & Safety
Supertest 450 shares the risk profile of all testosterone esters - the six-ester format smooths the plasma levels, but the high total dose per injection makes E2 control more important than with standard TRT doses.
Documented in studies and the application literature:
- Estrogen conversion: testosterone aromatizes to estradiol. With the high total dose per injection the E2 rise is more pronounced, with documented water retention, blood pressure rise and at higher doses gynecomastia risk.
- Suppression of endogenous production: exogenous testosterone throttles the body’s own production via the HPTA axis. Testicular atrophy and reduced fertility are documented, recovery after discontinuation is not guaranteed.
- Cardiovascular: studies describe unfavorable shifts in the lipid profile (HDL falls), elevated hematocrit and an associated thrombosis risk.
- Other: acne, accelerated hair loss with genetic predisposition. The long esters (Decanoate, Enanthate) make clearance slow if side effects occur.
Baseline bloodwork before, during and after a research protocol is strongly advised. This classification does not replace medical advice. Risk and responsibility for any actual use lie entirely with the buyer.
Studies
- Comparative pharmacokinetics of testosterone esters - Testosterone (Springer) 1998, Behre & Nieschlag: Comparative pharmacokinetics of the individual esters combined in a multi-ester mixture.
- Comparative pharmacokinetics of testosterone enanthate and testosterone cyclohexanecarboxylate as assessed by serum and salivary testosterone levels in normal men - International Journal of Andrology 1984, Schürmeyer et al: Ester pharmacokinetics in detail, showing the influence of the ester chain on the serum level profile.
- The Effects of Supraphysiologic Doses of Testosterone on Muscle Size and Strength in Normal Men - New England Journal of Medicine 1996, Bhasin et al: Foundational study on supraphysiologic testosterone effects on muscle size and strength.
- Testosterone dose-response relationships in healthy young men - American Journal of Physiology-Endocrinology and Metabolism 2001, Bhasin et al: Dose-response study, relevant for the high total doses achievable with a highly concentrated mix.
- Effects of Testosterone on Muscle Strength, Physical Function, Body Composition, and Quality of Life in Intermediate-Frail and Frail Elderly Men - The Journal of Clinical Endocrinology & Metabolism 2010, Srinivas-Shankar et al: Randomized placebo-controlled study on testosterone effects on strength and body composition.
