Mastoral - anabolic and androgenic steroid from the UK pharmaceutical company Alpha Pharma. The main active ingredient - metildrostanolon. The steroid oral form Mastoral release - 50 tablets of 10 mg. Metildrostanolon is a modified form of drostanolone, and differs from it only by adding an alpha-methyl group, which allows the drug does not break down when passing through the liver. Scientific studies show that high Mastoral has anabolic (four times greater than methyltestosterone) and low androgen (five times less) activity. The most common steroid used by athletes from UK who want to get rid of fat without the risk of androgenic side effects.
For the first time metildrostanolon was invented in 1959 in UK by the international pharmaceutical company Syntex, known for the production of oxymetholone and drostanolone propionate. But, unlike the mentioned pharmacological agents, it never classified as a medicinal product. First metildrostanolon sold as a modified hormone called dimetazin, which is made from two coupled molecules. Today, the main active Mastoral substance - a modified dihydrotestosterone.