4-Androstenedione API Manufacturers & Suppliers

Androstenedione is a delta-4 C19 steroid hormone produced primarily in the testes, ovaries, and adrenal cortex. It functions as a key metabolic intermediate in the biosynthesis of both androgens and estrogens, serving as a precursor to testosterone, estrone, and estradiol depending on tissue-specific enzymatic activity.

Belonging to the class of androgens and derivatives, androstenedione is a 3-hydroxylated C19 steroid that influences the development of masculine secondary sexual characteristics. Its physiological activity includes modulation of scalp and body hair growth, reflecting its role in androgenic signaling pathways.

Mechanistically, androstenedione participates in steroidogenesis by undergoing enzymatic conversion via 17β-hydroxysteroid dehydrogenase and aromatase enzymes. This conversion facilitates its transformation into active androgens or estrogens, highlighting its dual function in endocrine regulation. It is classified as a substrate of cytochrome P450 enzymes, notably CYP3A4, which implicates metabolic interactions in the liver.

Pharmacokinetic data indicate androstenedione undergoes typical steroid metabolism, with hepatic biotransformation and renal excretion. The compound’s ADME profile includes absorption and distribution consistent with lipophilic steroids; however, detailed parameters such as half-life and bioavailability require further elucidation.

From a safety perspective, androstenedione has been investigated primarily in experimental and illicit contexts, with no approved therapeutic indication. Its use has been associated with endocrine disruption potential, including alterations in hormone balance, and thus it warrants cautious handling. Toxicological profiles highlight the need for monitoring androgenic and estrogenic effects, particularly in off-label settings.

Notable for its role as a biochemical precursor rather than a direct therapeutic agent, androstenedione is not commercialized as a pharmaceutical product under recognized brand names. Its status as a controlled substance in some jurisdictions restricts clinical application, particularly due to concerns about misuse.

Sourcing of androstenedione API requires attention to stringent quality standards, including purity, stereoisomeric composition, and compliance with regulatory guidelines to minimize contamination and ensure batch-to-batch consistency. Suppliers should provide full documentation on synthetic routes, analytical characterization, and stability data to support pharmaceutical development and regulatory submission.