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Product Name: Androstenedione,Androstendione,ASD,ADION,Andro,4AD Synonyms: 4-AD;4-Androstene-3,17-dione; 4-androstenedione CAS No.: 63-05-8 Molecular Formula:C19H26O2 Molecular Weight: 286.41 EINECS No.: 200-554-5 Assay: 98.5% Packing: foil bag Appearance: White crystalline powder Androstenedione is a hormone produced naturally in the body by the adrenal glands, the ovaries (in women), and the testicles (in men). The body first manufactures DHEA , then turns DHEA into androstenedione, and finally transforms androstenedione into testosterone, the principal male sex hormone. Androstenedione is also transformed into estrogen. It is widely used by athletes who believe that it can build muscle and increase strength. In females, the outer part of the adrenal glands (known as the cortex) and the ovaries release androstenedione into the bloodstream where it is converted to provide around half of all testosterone and almost all of the body’s oestrone, a form of oestrogen. Although the testes produce large amounts of androstenedione in males, they secrete little of this into the blood and, instead, rapidly convert it into testosterone within the testes. The adrenal glands also produce androstenedione in men, but this contribution is swamped by the testes’ overwhelming production of the other androgenic hormone, testosterone.