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Epitestosterone, or isotestosterone, also known as 17α-testosterone or as androst-4-en-17α-ol-3-one, is an endogenous steroid and an epimer of the androgen sex hormone testosterone. It is a weak competitive antagonist of the androgen receptor (AR) and a potent 5α-reductase inhibitor .
Testosterone levels in males and females ; Total testosterone Stage Age range Male Female Values SI units Values SI units ; Infant: Premature (26–28 weeks) 59–125 ng/dL: 2.047–4.337 nmol/L
Testosterone can be taken by a variety of different routes of administration. [2] [3] These include oral, buccal, sublingual, intranasal, transdermal (gels, creams, patches, solutions), vaginal (creams, gels, suppositories), rectal (suppositories), by intramuscular or subcutaneous injection (in oil solutions or aqueous suspensions), and as a subcutaneous implant.
The number one thing you want to get tested if you’re symptomatic is your total testosterone levels, which includes all forms of testosterone in your body: unbound free T, SHBG-bound T, and ...
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] In addition, the dissociation rate of DHT from the AR is 5-fold slower than that of testosterone. [49]
1-Testosterone (abbreviated and nicknamed as 1-Testo, 1-T), also known as δ 1-dihydrotestosterone (δ 1-DHT), as well as dihydroboldenone, is a synthetic anabolic–androgenic steroid (AAS) and a 5α-reduced derivative of boldenone (Δ1-testosterone). It differs from testosterone by having a 1(2)-double bond instead of a 4(5)-double bond in ...
4-Hydroxytestosterone (4-OHT), also known as 4,17β-dihydroxyandrost-4-en-3-one, is a synthetic anabolic-androgenic steroid (AAS) and a derivative of testosterone that was never marketed.
Comamonas testosteroni is a Gram-negative environmental bacterium capable of utilizing testosterone as a carbon source, and degrading other sterols such as ergosterol and estrogens. [1] Strain I2 gfp has been used in bioaugmentation trials, in attempts to treat the industrial byproduct 3-chloroaniline. [ 2 ]