Testosterone 400mg/mL is an injectable androgen formulation in MCT oil supplied in a 10mL vial. Manufactured for consistency, stability, and research applications.
Format10mL Vial
Concentration400mg/mL
CarrierMCT Oil
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HPLC verified. COA on file for this batch
Ships from within Canada; No Customs
Discreet plain packaging; always
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Testosterone 400mg/mL is a high concentration injectable testosterone formulation delivering 400mg of testosterone per milliliter in a 10mL multi dose vial using MCT (medium chain triglyceride) oil as the carrier base. At 400mg/mL this represents one of the highest concentration testosterone formulations in CSD’s injectable range, and MCT oil’s exceptionally low viscosity is a critical carrier choice at this concentration level; heavier traditional oil carriers like cottonseed or sesame oil would present significantly increased draw and administration resistance at 400mg/mL, making MCT oil the most practical carrier for a high load testosterone formulation of this concentration.
The defining characteristic of this formulation is its concentration 400mg/mL delivers a substantially higher testosterone payload per milliliter than standard single ester formulations like CSD’s 200mg/mL and 250mg/mL testosterone variants. For research protocols requiring higher dose administration, this high concentration format allows equivalent compound delivery in a significantly reduced injection volume compared to lower concentration alternatives. This volume reduction is a meaningful practical consideration in protocols involving repeated long term administration where minimizing injection volume per dose is a priority variable.
As a testosterone based formulation, this compound aromatizes to estrogen, supports androgen receptor activity, and produces the full hormonal profile associated with exogenous testosterone administration. Researchers selecting between CSD’s standard concentration single ester testosterone formulations and this high concentration variant will find the base compound pharmacology consistent concentration and carrier representing the primary selection variables for protocol planning purposes.
Every batch of CSD’s Testosterone 400mg/mL is third party lab tested for concentration accuracy and purity prior to release, with COA documentation available on request. Canada Steroid Depot has supplied Canadian customers with consistently verified, accurately dosed compounds for years, and our high concentration testosterone range represents some of the most specialized formulations available from a verified Canadian supplier. All orders ship discreetly across Canada in plain, unmarked packaging with no identifying information on the exterior.
Store at room temperature away from direct light and heat. Do not freeze. Intended for research purposes only.
Commonly researched alongside an aromatase inhibitor. Browse CSD’s full injectable testosterone range and PCT compounds for complete protocol sourcing.
This Test 400 delivers 400mg of total testosterone per mL in MCT (medium chain triglyceride) oil; one of the lightest and lowest viscosity carrier oils available for injectable formulations. High concentration testosterone blends such as Test 400 typically require higher solvent levels to keep all compounds in solution, which can cause post injection site discomfort. The MCT oil carrier in this formulation significantly reduces injection viscosity compared to heavier carriers such as cottonseed or grape seed oil, flowing freely through standard 23–25 gauge needles at room temperature without pre warming and producing minimal injection site reactions.
At 400mg/mL, each 1mL injection delivers 400mg of total testosterone significantly more than standard 250mg/mL formulations which require 1.6mL to deliver the same dose. This high concentration makes Test 400 particularly practical for higher dose research protocols where minimizing injection volume per administration is a priority. A 0.5mL injection delivers 200mg, a full TRT research dose in half the injection volume of a standard 200mg/mL formulation.
Administration frequency depends on the ester composition of the blend. As a multi ester blend containing both short and long acting esters, once or twice weekly administration is the most common research schedule once weekly for protocols prioritizing convenience, twice weekly for tighter serum testosterone stability. The MCT oil carrier reduces the viscosity advantage of pre warming that heavier oil formulations benefit from, making this the most injection ready high concentration testosterone formulation in CSD's catalogue.
High concentration testosterone blends such as Test 400 require a higher proportion of solvents; typically benzyl alcohol and benzyl benzoate to maintain all compounds in stable solution at 400mg/mL. This higher solvent content can cause post injection site discomfort or burning sensations in a subset of researchers, particularly with heavier carrier oils. The MCT oil carrier in this formulation mitigates this significantly compared to cottonseed or grape seed oil versions; making it the most comfortable Test 400 formulation available. Injecting slowly and ensuring the injection site is fully relaxed further minimizes any discomfort.
Yes! This batch has been independently HPLC tested by an accredited third party laboratory confirming total testosterone concentration accuracy at 400mg/mL. A certificate of analysis is available.
