The Super Soldier Serum is a fictional enhancement formula from the Marvel Comics universe, primarily associated with the character Captain America. It was designed to increase physical abilities, including strength, speed, agility, and endurance, transforming an ordinary human into a super-soldier. The serum was developed during World War II to create a new breed of soldiers capable of fighting in extreme conditions. In the comics, the serum was first administered to Steve Rogers, a frail young man who became the iconic Captain America. The serum's effects are often depicted as temporary or requiring specific conditions to maintain, and it has been a central element in various storylines, exploring themes of power, responsibility, and the consequences of human enhancement.