Thunderbolt. In addition to being an excellant preworkout pump product there is also supposed to be myostatin inhibition to go with it. Check the product write up
Even than its not primary marketed as a myostatin inhibitor but it's part of the formula. it's not the same as marketing some bullshit extract and making wild claims over mouse studies/elderly men testing grip strength studies.
Edited by Chuck89, 04 May 2014 - 08:23 AM.