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Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.
The 17α-ethenylated (vinylated) testosterone derivative norvinisterone (vinylnortestosterone) is much more potent as an AAS than the 17α-ethynylated testosterone derivatives and is intermediate in potency between the 17α-ethynylated progestins and conventional AAS, with approximately one-third and one-fifth of the respective androgenic and ...
Most mammals, including humans, have an XY sex-determination system: the Y chromosome carries factors responsible for triggering male development. In the absence of a Y chromosome, the fetus will undergo female development. This is because of the presence of the sex-determining region of the Y chromosome, also known as the SRY gene. [5]
DHT is a potent agonist of the AR, and is in fact the most potent known endogenous ligand of the receptor. It has an affinity (K d) of 0.25 to 0.5 nM for the human AR, which is about 2- to 3-fold higher than that of testosterone (K d = 0.4 to 1.0 nM) [47] and 15–30 times higher than that of adrenal androgens. [48]
Conversely, “with too much testosterone, women often have acne, too much hair on the body, hair loss on the head, high blood pressure, elevated cholesterol, skipped cycles, or problems ...
Dihydrotestosterone (DHT) is a metabolite of testosterone, and a more potent androgen than testosterone in that it binds more strongly to androgen receptors. It is produced in the skin and reproductive tissue. A4 and testosterone can also have an extra hydroxyl (-OH) or keton (=O) group bound on position 11.
Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical role in helping control fat levels, cholesterol, and glucose levels.
Testosterone levels very with age, according to the Cleveland Clinic, and start to drop around age 30 or 40. Women turn to weight loss drugs in menopause: What to know about the benefits and risks
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