Brand: Hubei
Proviron Hubei is a tablet that contains mesterolone, supplied in a pack of 30. Mesterolone is an androgen derived from DHT, discovered in the 1930s and marketed by Schering as Proviron. In medicine, it's used for male hypogonadism caused by too little testosterone, for conditions that call for support of protein buildup in the body, and in male osteoporosis. It's a weak anabolic compound, so any muscle gain it gives is small. What users mention more is muscle hardness and density. In strength-training literature, it's a support compound, mostly discussed for its role next to stronger products.
Proviron Hubei is mesterolone, a DHT-based androgen with a methyl group at the first carbon. That change lets it survive digestion without the 17-alpha alkyl group that makes most oral steroids hard on the liver. Because of that, it's only mildly stressful to the liver and kidneys. It binds well to the androgen receptor, though much of it is converted to a weaker form in muscle tissue. Each tablet contains 25 mg.
It is a mesterolone tablet from Hubei, China, packed as 30 tablets of 25 mg each.
They contain the same active ingredient, mesterolone. The original Proviron is made by Bayer Schering, and Proviron Hubei is a different manufacturer's version.
Only a little. It's a strong androgen with weak anabolic action, and its reported effect is more on muscle hardness and density than on size.
Some sources say it limits the conversion of other hormones to estrogen. That effect is reported, not proven, and it's different from how tamoxifen works, which blocks estrogen receptors.
All three contain mesterolone at 25 mg per tablet and share the same pharmacology and half-life. The differences are the manufacturer and the pack size.
No. Mesterolone has never been approved for prescription use in the United States. It's approved and prescribed in some other countries, and this specific product is not an approved medicine.
No. Non-prescribed use is regulated or prohibited in most countries.
Hubei, China
Genesis, Singapore
Anfarm Hellas S.A., Greece
Organon, Oss, Netherlands (Pregnyl® 5000)
Genesis, Singapore
Bayer Schering Pharma, Germany
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