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Concept
Nandrolone
Summary
Nandrolone, also known as 19-nortestosterone, is an endogenous androgen which exists in the male body at a ratio of 1:50 compared to testosterone. It is also an anabolic steroid (AAS) which is medically used in the form of esters such as nandrolone decanoate (brand name Deca-Durabolin) and nandrolone phenylpropionate (brand name Durabolin). Nandrolone esters are used in the treatment of anemias, cachexia (muscle wasting syndrome), osteoporosis, breast cancer, and for other indications. They are not used by mouth and instead are given by injection into muscle or fat.
Side effects of nandrolone esters include symptoms of masculinization like acne, increased hair growth, and voice changes; and decreased sexual desire in men due to its ability to suppress endogenous testosterone synthesis while not being a sufficient androgen itself. They are synthetic androgens and anabolic steroids and hence are agonists of the androgen receptor (AR), the biological target of androgens like testosterone and dihydrotestosterone (DHT). Nandrolone has strong anabolic effects and weak androgenic effects, which give them a mild side effect profile and make them especially suitable for use in women and children. There are metabolites of Nandrolone that act as long-lasting prodrugs in the body, such as 5α-Dihydronandrolone.
Nandrolone esters were first described and introduced for medical use in the late 1950s. They are among the most widely used AAS worldwide. In addition to their medical use, nandrolone esters are used to improve physique and performance, and are said to be the most widely used AAS for such purposes. The drugs are controlled substances in many countries and so non-medical use is generally illicit.
Nandrolone esters are used clinically, although increasingly rarely, for people in catabolic states with major burns, cancer, and AIDS, and an ophthalmological formulation was available to support cornea healing.
The positive effects of nandrolone esters include muscle growth, appetite stimulation and increased red blood cell production, and bone density.
Official source
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