I understood that Lychee contains a chemical that prevents the body from "burning" fat and protein. This would be bad for diabetics as low glucose levels can't

I understood that Lychee contains a chemical that prevents the body from "burning" fat and protein. This would be bad for diabetics as low glucose levels can't be helped by burning fat. And it's the opposite what dieters want, because fat doesn't burn. I got the impression that the symptoms of the sick/dead children were not unlike a low glucose shock from diabetes once the sugar from the fruit had been consumed. Perhaps there are other medical uses, but not these two cases.