This is a market research, observational study to evaluate the tolerability and acceptability of MCT supplements for young children and young people with intractable epilepsy, GLUT-1 or PDHD from 3 years to adulthood. Patients with a confirmed diagnosis of a fatty acid oxidation disorder, which requires a specialist diet including MCT will be included in this study

Inclusion Criteria:

• Diagnosis of epilepsy or a fatty acid oxidation disorder requiring a ketogenic or a specialist diet as part of their treatment, which includes MCT.
• Subjects who are new to or already taking an MCT oil and are willing to try each of the 3 study products for 7 days each. 21 days taking product with 2 days between new product trialled.
• Patients aged 3 years of age to adulthood.
• Written informed consent obtained from patient or parental caregiver.

Exclusion Criteria:

• Presence of serious concurrent illness
• Investigator's uncertainty about the willingness or ability of the patient to comply with the protocol requirements
• Participation in any other studies involving investigational or marketed products concomitantly or within two weeks prior to entry into the study.
• Any patients having taken antibiotics over the previous 2 weeks leading up to the study.
• Patients less than 3 years of age.

This study will be used to demonstrate acceptability for registration and reimbursement of these foods for special medical purposes.