I've also searched around about increasing of intelligence. Hard work should be reciprocally rewarded with the amount of work that you put into. However when genius person wants to learn calculus they need 7 days to master the course, on the other hand 85 iq person is almost incapable of learning calculus in a course of a lifetime. Yep life is not fair, some people get the strong brain, strong health, and some are on the opposite spectrum. That should be fixed in the future as everyone should have at least a close starting point or identified useful aptitude.