The extra copy alpha tryptase trait is may very well be involved in a large number (perhaps majority) of cases of autism, but it's very early days re that trait

The extra copy alpha tryptase trait is may very well be involved in a large number (perhaps majority) of cases of autism, but it's very early days re that trait. Here, "involved" means a necessary condition (for those cases) but not a sufficient condition. PS - melanin (a tan) is more effective than chelation in sequestering mercury.