One word that negates all this: Chemistry.
At 40 years old age, a certain ballplayer, in 373 at bats, hits .362, 45 homers, 101 RBI's along with a .609 OBP and .812 slugging percentage, all because of chemistry.
Give it time and those Limitless pills will probably become reality.
If you don't have the genetics, get the synthetics.