Nobody "gives" you autism.
Some people don't methelate as much metal as others, the chemical responsible is called Glutathione.
Autism is a spectrum of damage caused by heavy metal retention.
Here's a theory: Smart, sensitive people naturally retain metals for some reason…
Unfortunately I don't know. However, Chlorella, food grade diatomaceous earth, and others are naturally sourced methylating agents.
I would recommend at least finding the cleanest source of Chlorella you can find, and iodine, selenium, magnesium.
Tumeric is very good for helping with depression/brain fog and some others