Do intelligent people have more zinc and copper in their hair?

It’s a well-known fact, that intelligent people have more zinc anc copper in their hair. But is it true?
In fact, this is a difficult question, because there isn’t a thing that proves this, but there’s also nothing that tells us it’s wrong.
One researcher had considered that perhaps they have more heavy metals in their hair and well, it acts like an antenna and thus they can pick up other brain waves better or attract more electromagnetic energy from the air, thus their minds work at higher or more rogue waves per usage?
If a pilot, soldier or race car driver put copper and zinc in their helmet would that help make them smarter or is it from the body discharging the heavy metals easily from the body that makes the brain work better. If so, if you reduced you zinc and copper in your blood true filtration, could you increase cognition?
Other people say that more zinc anc copper have people with brown or red hair. So this explains the myth that all blondes are not so smart.