At Tony's sentimental farewell party, Ivan Vanko caused a huge disaster, forcing Luo Xia to bring out the Healing Serum to save people.
At the time, Stephen had been curious and secretly taken a dose. Although he hadn't managed to learn anything from it, he had confirmed that the serum was connected to his hand tremors.
Besides Stephen, someone else had also taken a dose of the Healing Serum to study on his own. Norman Osborn was the other person who had brought it back with him.
Osborn Industries had always been a competitor of Stark Industries, and the weapons produced by the two companies were evenly matched. The difference was that Stark had previously focused more on large weapons such as missiles, while Osborn concentrated on high-end personal weapons and biological weapons research.
The latter was often only a hair's breadth away from being illegal.
Norman Osborn was a very bold man. So even though he knew that research into the Super Soldier Serum had ended in countless tragic failures, he still devoted a great deal of effort to developing it.
Captain America had been successfully enhanced, but shortly afterward, Abraham Erskine, who had overseen the experiment, was assassinated by Hydra. The final dose of the serum was destroyed, and even the experimental data was lost.
From then on, no one had been able to recreate the complete Super Soldier Serum. There was only one Captain America in the world.
Norman Osborn was obsessed with human enhancement experiments. However, he was probably not as intelligent as Bruce Banner. Even Banner had turned himself into the Hulk by accident, and Norman Osborn had naturally made no groundbreaking progress either.
But after he brought the Healing Serum back, he realized it solved many of the key problems in his research.
Norman