22q13 deletion / Phelan-McDermid Syndrome diet. Is there a diet which improves the quality of life of people with 22q13 deletion / Phelan-McDermid Syndrome?

Are you aware of a diet that can improve the quality of life of people with 22q13 deletion / Phelan-McDermid Syndrome? Is there a diet that is suggested to avoid when having 22q13 deletion / Phelan-McDermid Syndrome? See if there is a diet that can improve the quality of life of people with 22q13 deletion / Phelan-McDermid Syndrome, recommended and to avoid food when having 22q13 deletion / Phelan-McDermid Syndrome