system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Does the Super Soldier Serum increase one's intelligence to peak human levels?

Captain America is usually portrayed as reasonably smart(he has a 3 in intelligence on the power grid) but isn't it said somewhere that his intelligence was boosted in a similar manner to his strength?
gpt
"Peak Human" is often taken as a blanket term to mean "The absolute best any human can ever be in this field", which isn't exactly accurate. For something like the density of his muscles and bones or the resilience of his joints, you could very accurately describe him as "peak human". In terms of physical strength, however, he'd really only be the peak for someone of his height and weight. Someone significantly smaller than him would have a lower peak strength, and someone significantly larger than him would have higher peak strength.

"Intelligence" is even trickier to quantify in this regard, because Intelligence isn't just about biology. The structure of your brain plays a role, and so does your level of education and expertise. Individuals like Tony Stark and Peter Parker were leagues above Captain America in terms of Intelligence  without the super solider serum, because they had highly developed brains and they put in the work to master their areas of interest. 

This isn't to say that Steve isn't intelligent, because he definitely is, but he hasn't cultivated that Intelligence in the same way Tony or Peter have.

What the serum probably did was give him peak processing power, meaning he could work through problems much more rapidly. It might have also given him a heightened ability to focus, which syncs very well with his training as a soldier. It might have also enhanced his ability to store and recall information. The end result is a man with a very high aptitude for kinetics, tactics, and weighing probability and statistics. It might have also made it easier for him to pick up a few useful technical skills,  like hot wiring a Quinn Jet, but it didn't magically give him an aptitude in Biology or Computer science. 

The serum probably did to his brain what it did with the rest of his body: made it the absolute best it could physically be.