Evaluation of PDE MAX

Inclusion Criteria: * Diagnosis of Pyridoxine Dependent Epilepsy (PDE), biochemically and/or genetically confirmed. * Males or females aged one (1) year and above. Any participant aged 16 years and over at screening must have the capacity to consent for themselves. * Currently following a lysine-restricted diet for a minimum of four (4) weeks prior to screening. * Willing to take the study product and follow advice given by the dietitian. * Willingly given, written, informed consent from patient or parent/guardian. * Willingly given, written assent (if appropriate). Exclusion Criteria: * Inability to comply with the study protocol, in the opinion of the investigator. * Use of additional macro/micronutrient supplements during the study period, unless clinically indicated and prescribed by the investigator, such as but not limited to arginine and pyridoxine. In which case, supplementation must have started four (4) weeks prior to screening with no anticipated changes to intakes during the study duration. * Participants who are pregnant / breastfeeding at the start of the study or planning to become pregnant during the study period. Participants of child-bearing potential will be required to undergo pregnancy test prior to enrolment. N.B.: Participants who become pregnant unexpectedly during this study may, in consultation with their doctor, continue on the study's dietary product if they wish but will not have any investigations that would not normally be carried out during…