Interesting that we ignore the physical environment as a contributing factor in IQ, growth, and development. For example:

* Iodine supplementation during early life (a few weeks) increases IQ * Organophosphate exposure increases autism (also why people who live near airports have higher incidence of cancer) * Phalates and non-sticks reduce male reproductive organ size * Music lessons in children increases IQ. * L-arginine during childhood increases height and free growth hormone

https://link.springer.com/article/10.1007/s11154-022-09760-7 https://www.sciencedirect.com/science/article/abs/pii/S01602... https://www.researchgate.net/publication/237236129_The_Plane...