Buy 98.52% Purity USP Bulk Raw Metribolone (Methyltrienolone)  Powder Online CAS 965-93-5   Metribolone Description Metribolone (methyltrienolone aka R1881) is a potent, non-aromatizable androgen that is structurally similar to trenbolone and has been referred to as “oral tren.” Methyltrienolone binds strongly to the androgen receptor (AR) and is a more potent agonist (activator) of the androgen receptor than is DHT. …