Biotest produce a smart range of hardcore bodybuilding supplements including fat burners, recovery formulas, testosterone boosters and oestrogen blockers. The most popular product from Biotest during Summer 2009 has been Biotest's fat burner, Hot Rox Extreme, which was so popular that the supply couldn't meet the demand this year and for a couple of weeks, not even the Biotest factory in USA could supply the product to meet the needs of the bodybuilding world. At Promart Supplements, however, we now have all Biotest prodcuts back in plentiful stock!