Testosterone Suspension is a pure, non‑esterified testosterone preparation formulated as microscopic testosterone crystals suspended in water for injection. This aqueous formulation allows for very rapid absorption from the injection site, producing a swift rise in serum testosterone and a pronounced, short‑acting anabolic–androgenic effect. Because of its brief duration of action, Testosterone Suspension is typically used in protocols that require tightly controlled dosing and acute androgen support, rather than long‑term baseline replacement covered by longer‑acting esters. Its potent and fast‑onset profile makes it a specialized option for professionals seeking immediate testosterone activity with maximal flexibility in dose titration and scheduling.