The study aims to include 10 PTSD patients. If a participant drops out of the study, or if the study is otherwise terminated for a participant, another patient will be recruited until 10 have completed the study. The primary objectives of this feasibility study are to investigate if it is possbile to carry out a ketogenic diet therapy for patients with PTSD for 4 weeks, and systematically gain insight in all challenges relating to these objectives. The participants will follow a ketogenic diet for 4 weeks, and they are asked to self report daily on results from finger pricking blood measurements (glucose and betahydroxybutyrate (BHB)) to establish they are in a ketogenic state and are compliant to diet. Participants will also report food intake and side effects daily to be evaluated by the principal investigator. Participants are further asked to specify and elaborate on which adverse effects or other reasons as to why it is challenging to follow the study diet and/or procedures. The study lacks in power to statistically evaluate if ketosis has any effect on PTSD symptoms, however this secondary objective will be preliminary evaluated.
