Proviron is the brand name for mesterolone, an oral androgen derived from dihydrotestosterone (DHT) that has been prescribed since the 1960s primarily to treat low sperm counts and certain symptoms of testosterone deficiency in men. Proviron stimulates the growth, development and function of effector organs under androgenic influence, as well as the development of secondary male sexual characteristics in cases of pre-pubertal androgen insufficiency. Proviron in bodybuilding cycles: learn the real risks, side effects, and hormone impact from a coach who has helped 2000+ men recover. What is proviron, chemically: mesterolone, 1-alpha-methyl-dihydrotestosterone, an oral androgen that is not 17-alpha-alkylated and cannot be aromatised into estradiol. Proviron was developed as an androgen substitute and an infertility drug and is still prescribed in some countries for hypogonadism and aging male symptoms (PMID 25842579). Discover the complete Proviron steroid guide. Learn about its DHT-driven effects, libido impact, safety, and myths—all in one expert-reviewed article. Proviron (mesterolone) is not a first-line ED treatment like Viagra or Cialis but may help men whose erectile problems are linked to low testosterone or androgen deficiency. It works by restoring hormone balance, improving libido, and supporting sexual function. What Proviron (mesterolone) is, how a Proviron cycle is used, commonly reported dosages, realistic results, side effects, and whether PCT is needed. A clinical review of Proviron (mesterolone), the oral DHT-derivative androgen not approved in the US, including its pharmacology, evidence gaps, and how it… Learn everything about Proviron (Mesterolone), its benefits, uses, side effects, and alternatives with CrazyBulk’s complete guide to this popular compound. Mesterolone, sold under the brand name Proviron among others, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of low testosterone levels. [2][3] It has also been used to treat male infertility, although this use is controversial. [2][4][5] It is taken by mouth.