If this unfortunate young man went to a public school in the United States, a flyer would go home to every kid in his class saying they could only bring chicken, carrots, grapes, potatoes and apples for lunch and that there would be no parties with cakes or treats for birthdays.
Sigh... In my day, we had in school one of the moms who planned each lunch, with good old home cooking, never any fast food, and we kids played outside with mercury watching it turn black in our hands, and making dimes shiny. (silver in those days)
I am still alive after all that.
Yes, his malady is real enough and here these days it would be taken out on all the other kids. The whole school would have to suffer.
Now, if the kids were taught that math is spelled meth, that might be ok.