Testosterone and methyltestosterone are both androgens, which are male sex hormones. However, there are some differences between the two:
Chemical Structure:
Testosterone: It is the natural male sex hormone produced by the testes in men and, to a lesser extent, by the ovaries in women. Testosterone has a specific chemical structure.
Methyltestosterone: It is a synthetic form of testosterone with a modification in its chemical structure, specifically the addition of a methyl group. This modification affects its metabolism and some of its properties.
Route of Administration:
Testosterone: It is often administered through injections, gels, patches, or pellets implanted under the skin.
Methyltestosterone: It is available in oral form (tablets) for administration.
Metabolism:
Testosterone: When administered, testosterone undergoes metabolism in the body, including conversion to dihydrotestosterone (DHT) and estradiol.
Methyltestosterone: The addition of a methyl group alters its metabolism compared to natural testosterone.
Medical Uses:
Testosterone: It is used to treat conditions associated with testosterone deficiency, such as hypogonadism and delayed puberty.
Methyltestosterone: It is also used in the treatment of testosterone deficiency and delayed puberty, but its use is less common than natural testosterone due to potential side effects.
Bioavailability:
Testosterone: Depending on the administration method, bioavailability can vary. For example, injectable forms may have different bioavailability compared to transdermal patches or gels.
Methyltestosterone: As an oral medication, its bioavailability is influenced by factors like metabolism in the liver.