Те не включват наследствените недостатъци на аминокиселинен (фенилаланин) метаболизъм, като фенилкетонурия.
Since it is indicated in the Annex that aspartame, containing a source of phenylalanine may be harmful for people with phenylketonuria (and no comment is included in the Annex that a contraindication should be included in the SPC, such as done for peanut oil), this is not considered to be an absolute contraindication.