The superhuman serum is derived from extracting blood from numerous super soldiers.
When injected into the human body, it triggers untapped potential, leading to a transformation into a state of "perfection," enhancing intelligence, learning ability, strength, agility, senses, physique, and even conferring resistance to aging and death, ensuring perpetual youth.
Though the combat prowess of the superhuman serum may fall short of that provided by the heart-shaped herb, its overall benefits far outweigh those of the herb.
While a heart-shaped herb recipient enjoys enhanced physicality, the superhuman serum grants substantial cognitive and physical enhancements, turning an average person into a high-earning powerhouse.
Creating the superhuman serum, however, presents a greater challenge than the heart-shaped herb.
Undeterred by challenges, Fang Yan embraced the opportunity to engage in something demanding.
Fortunately, Fang Yan had previous experience with the superhuman serum, making him familiar with the process.
However, the version Fang Yan was attempting to create was the original one, used by Captain America and the Red Skull. Unfortunately, only two samples of this serum existed, and their use would deplete them. Even with knowledge of the production process, reproducing the first version was impossible.
"Jarvis, do I have all the necessary materials?"
"Sir, we have collected blood samples from elite special forces around the world, as well as their adrenaline."
Guided by Jarvis, Fang Yan entered another laboratory containing various large-scale machinery. Though it resembled a robotic manufacturing facility, it was the ideal setting to create superhuman serum, given its technological nature.
"It's not excessively complicated to replicate the serum used by Captain America."
Fang Yan gazed at the sterile environment and couldn't help but feel a sense of wonder.
The unique quality of the American team serum exceeded that of the Winter Soldiers due to special adjustments. To fully recreate it, Fang Yan needed to reverse engineer the mass-produced version.
Creating the mass-produced serum wasn't too challenging. Fang Yan possessed comprehensive data, allowing him to recreate it step by step.
Fang Yan first used a centrifuge to remove impurities from the collected blood. After allowing the blood to clot and the fibrin to contract, serum precipitated.
With the special forces serums on hand, Fang Yan began extracting valuable ingredients. These were then combined with adrenal gland components, resulting in the mass-produced serum described in his memories.
The subsequent phase was the most intricate. Fang Yan aimed to modify the serum's composition to mirror the enhancements displayed by Captain America.
One example involved replicating the serum's youth-preserving properties. To achieve this, Fang Yan needed to suppress DNA information loss during cellular mitosis. Several Earth substances exhibited this function, including amino acids and organic acids found in ancient ginseng, which inhibited cellular aging.
"Jarvis, extract the 2nd, 3rd, and 5th amino acids and organic acids from the ancient ginseng, then combine them with the mass-produced serum according to the Erskine ratio. Produce a sample for testing."
"Of course, sir."
A new serum sample was produced, allowing Fang Yan to analyze its effects and conduct experiments for further insight.
Another property displayed by the US team was immunity to various toxins. Certain Earth animals, like the honey badger, hedgehog, and meerkat, were immune to snake venom. When venom entered their bodies, cells rapidly produced anti-venom, breaking down toxins and absorbing them.
However, as the mass-produced superhuman serum already possessed a level of anti-toxicity, conflicts arose when combined with the anti-venom substances. Fang Yan needed to determine the superior anti-venom serum and integrate it into the superhuman serum.
"Jarvis, extract anti-venom serum from the honey badger, hedgehog, and meerkat, then compare it with the mass-produced serum and integrate the superior anti-venom component."
"Understood, sir."
Additional serum samples were produced, allowing Fang Yan to analyze the comparative effects.
Besides these properties, the US team possessed an array of superhuman abilities, surpassing even the Winter Soldier.
Inexhaustible stamina, rapid healing, fully developed brain, unparalleled learning capabilities, and more—all were objectives Fang Yan sought to achieve.
Fang Yan had the advantage of breaking down each ability, identifying necessary substances, and incorporating them into the serum.
This process took longer than before, spanning half a month.
Fang Yan meticulously extracted substances from various animals and plants, integrating them into the serum, then analyzing and testing their effects.
The challenge in creating the superhuman serum stemmed from Fang Yan's lack of exposure to the first serum version. Consequently, he needed to infer its composition based on its effects.
Though Fang Yan comprehended the underlying principles, he required extensive experimentation to determine the optimal solution.
However, this was advantageous, as Fang Yan's optimizations resulted in a serum superior to the original US team version.
Ultimately, Fang Yan managed to produce the perfect superhuman serum after two weeks of relentless effort.