Phenylketonuria

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…of phenylalanine, but butter, jam , sweets and drinks can be taken in unlimited amounts as they are low in phenylalanine. Children are also permitted special brands of breads, flours, biscuits and pastas. Between the age of six and 12 , the diet is allowed to return to normal, although any deterioration in school work or general behaviour requires urgent reassessment and restarting of the diet, if test show that the blood levels of phenylalanine are very high.