Super-Soldier Serum

The Super-Soldier Serum is actually one-half of a process used to turn scrawny little Steve Rogers into the dominating power-house known as Captain America. The serum, when combined with vita rays, created a transformative effect that increased muscle tissue and density in a living subject on a permanent basis. The formula was developed by Doctor Abraham Erskine and employed by the United States Army in the early 1940s as part of top secret government program called Operation: Rebirth.