TU-300 Testosterone Undecanoate Oil Steroids Injectable 300mg/ml

Description

Testosterone Undecanoate Ultra-Long Injectable Androgen Research

Compound Background

Testosterone Undecanoate (17β-undecanoyloxyandrost-4-en-3-one) is an ultra-long-chain synthetic ester of the primary endogenous androgen, engineered for protracted physiological activity through a specialized parenteral lipid delivery system. Testosterone undecanoate activates nuclear androgen receptors (AR) to facilitate the translocation of the receptor complex into the cellular nucleus for genomic transcription. Researchers prioritize this formulation for investigating long-term myogenic signaling and the preservation of endocrine homeostasis in advanced biological models. By utilizing an undecanoate ester, the molecule bypasses immediate hepatic sequestration to ensure sustained systemic bioavailability and minimal plasma volatility over extended durations.

Product Specifications

• CAS Number: 5949-44-0
• Molecular Formula: C30H48O3
• Molecular Weight: 456.70 g/mol
• Purity: >99% confirmed via HPLC-UV and GC/MS
• Appearance: Clear, pale yellow to golden viscous oil solution
• Solubility: Optimized in organic carrier lipids including refined Castor Oil and Benzyl Benzoate

Mechanism Overview

The pharmacology of Testosterone Undecanoate is defined by its exceptionally slow ester-cleavage kinetics and robust receptor binding affinity. Intramuscular esterases cleave the undecanoate chain to liberate the parent testosterone molecule into systemic circulation at a controlled rate. Free androgen ligands bind to cytoplasmic androgen receptors, causing a conformational shift and dissociation from heat shock proteins. The ligand-AR complex initiates genomic transcription by binding to specific androgen response elements (AREs) within the DNA, promoting the synthesis of myofibrillar proteins. Binding kinetics indicate a high affinity for the AR with a Ki value of approximately 0.5 to 1.2 nM. Quantitatively, the terminal half-life is documented at 18.3 to 23.7 days (±2.4 days) in healthy research models. Compared to Testosterone Enanthate, which possesses a 10.5-day half-life, the undecanoate ester provides a significantly broader pharmacokinetic window, effectively eliminating the frequent peaks and troughs associated with shorter-ester protocols.

Known Effects

• Sustained Lean Tissue Accrual: Investigators observe consistent increases in skeletal muscle cross-sectional area and lean body mass over 16-to-20-week research phases.
• Erythropoietic Modulation: Based on community feedback, effects include a marked increase in red blood cell production, facilitating improved peripheral oxygen transport over long durations.
• Positive Nitrogen Flux: Study data demonstrates a 35-45% improvement in nitrogen retention compared to baseline controls in chronic metabolic studies.
• Neurological Force Production: Observed effects include a steady upward trajectory in maximal strength and central nervous system (CNS) drive due to stable AR saturation.
• Metabolic Homeostasis: Research models demonstrate improved nutrient partitioning and a reduction in visceral adiposity through the modulation of lipid metabolism.

In Brief:
Testosterone Undecanoate remains the premier research tool for studying chronic androgenic signaling and myogenic regulatory factors with an unmatched pharmacokinetic stability profile.

Frequently Asked Questions

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare professional before use.