Alpha Pharma Healthcare’s Mastebolin is presented in 1-milliliter ampules and reportedly contains 100 milligrams of drostanolone propionate per milliliter according to the label and packaging. Samples of this product were purchased from a European-based internet source between the dates of October 7, 2015 and November 7, 2015. The samples were forwarded and received by the analytical laboratory ChemTox SAS for GC-MS/MS testing on November 19, 2015. The quantitative dosage testing report was completed on December 17, 2015. The “batch number” listed on the product was MB1403.