It's not something that originated here. These hypotheses are based on correlation. That does not imply causation though.
Disclaimer: my educated guess is that there is probably a real connection between lead and functioning of nervous system. Element particles/molecules probably have very high ability to diffuse through complex systems due to their small particle sizes.
Disclaimer: my educated guess is that there is probably a real connection between lead and functioning of nervous system. Element particles/molecules probably have very high ability to diffuse through complex systems due to their small particle sizes.