Metenolone (brand names Primobolan, Nibal) or methenolone, also known as methylandrostenolone, as well as 1-methyl-4,5α-dihydro-δ1-testosterone (1-methyl-δ1-DHT) or as 1-methyl-5α-androst-1-en-17β-ol-3-one, is a long-acting anabolic-androgenic steroid that is marketed for medical use. It is supplied as metenolone acetate for oral administration and as metenolone enanthate for depot intramuscular injection.

Effect of Metenolone
The pharmaceutical category to which methenolone belongs is anabolic steroids. It can be used to induce tissue growth by producing more protein. This process is known as anabolism, and the tissue enhancement leads to bulkier muscles.
Metenolone also imitates male sex hormones such as testosterone and dihydrotestosterone (DHT). Both are examples of androgenic hormones, which are responsible for developing and maintaining masculine characteristics such as the reproductive organ, facial hair and vocal chords. Thus, methenolone is officially known as an anabolic-androgen steroid (AAS). Some athletes use methenolone for building up muscle mass and physical power.

Metenolone Cycles & Doses
Because Primobolan is a very weak steroid most men will necessarily need to take in quite a bit to really see any effect. Many men who use Primobolan are often very disappointed simply because they didn't use enough. Further, men who take oral Primobolan are often left even more disappointed as it takes an even larger amount of the oral version to reap the same benefits as the injectable version. Most men will find 500mg per week to be the necessary dose to truly see any positive result(s) and because of its mild nature 8 weeks of use will be the minimum with 12 weeks being for more optimal.

Trenbolone cyclohexylmethylcarbonate     CAS  23454-33-3