There has been much buzz about myostatin blockers since we discoverred what myostatin does a few years back. Myostatin Blocker Information Now the pharma companies are working on a drug (FDA approval) that inhibits myostatin and this will be out on the next couple of years, but obviously this will require a script and sides might be an issue. Then some supp companies tried to sell a seaweed extract that does bind to myostatin in vitro, but there were no in vivo studies and it didn't seem to make it through absoprtion properly. Now there is a new approach by a biotech supp company that seems to have some scientific backing. They were able to reduce blood concentrations of myostatin by 37% and they are now doing studies to see if this translates into lean muscle mass. It looks like it has potential at least.