"Short of avoiding all these otherwise good foods containing phenols
and malonic acid, what can a PST child do to counter these
undesirable happenings? Take a teaspoon of apple cider vinegar
several times a day as recommended elsewhere in this paper. "
TERRIBLE "ADVICE".
Newsflash: Both apples and vinegar (especially) are EXTREMELY high in saliciylates/phenols. Just ridiculous and quite possibly harmful advice.