MusclePharm have been building up to the release of their GNC exclusive Black Label Series over the past few weeks, semi-coming through on their promise of a May 1st launch. We say semi as GNC’s website did already have most of the line available a week or so before their deadline. The protein powder Combat Black, pre-workout Assault Black, caffeinated cocktail Amino1 Black and the complex Creatine Black, were all on sale around April 22nd. The only Black Label Series supplement not uploaded was MusclePharm OxySport Black, which strangely enough has yet to be added. Despite the other four products showing up more than 7 days early, some more than that, the fat burner of the bunch has yet to appear. While we did post its information at the beginning of last month it seems we’ll be waiting a little longer to actually be able to purchase MusclePharm OxySport Black. In the meantime feel free to check out what’s available from the Black Label Series at GNC and if interested purchase one of the four.