Inclusion Criteria:  Patients who have a record at the institute and who have a diagnosis of a dissociative neurological symptom disorder with non-epileptic seizures with a certainty of at least clinically established who have a monthly seizure frequency greater than 3. Patients with the characteristics described above with comorbid epilepsy but who have not presented epileptic seizures in the last month. Patients with the aforementioned characteristics and who give their informed consent in writing to participate in the study. Patients who, once the diet has been explained to them, consider it feasible to implement it at least for the follow-up time.  Exclusion Criteria:  Patients with metabolic or hemodynamic instability, liver failure, inability to tolerate the oral route, acute pancreatitis or pregnancy due to the possible teratogenic effect that has not yet been elucidated. Patients with metabolic disorders such as primary carnitine deficiency, palmitoyltransferase carnitine I or II deficiency, carnitine translocase deficiency, beta oxidation defects, pyruvate carboxylase deficiency, porphyria and other fatty acid transport and oxidation disorders.