Vegetarian Diet and Innate Immunity in Patients With Myocardial Infarction and in Healthy Volunteers (FRESH-MI Study)

Inclusion Criteria for patients: * Acute myocardial infarction (STEMI/NSTEMI) with a clear culprit lesion on angiography and successful primary percutaneous coronary intervention (PCI) \<1 week before randomisation * Body mass index between 18.5 and 35 kg/m2 * Written informed consent Inclusion Criteria for healthy volunteers (life partners / souses) * Body mass index between 18.5 and 35 kg/m2 * Written informed consent Exclusion Criteria for patients and healthy volunteers: * Already on a vegetarian or vegan diet * Previous myocardial infarction * Diabetes Mellitus * Medical history of any disease associated with immune deficiency (either congenital or acquired, including chemotherapy, chronic steroid use, organ transplant) * Use of immunomodulatory drugs * Vaccination less than one month before start of intervention * Clinically significant infections within 1 months prior to start of intervention (defined as fever \>38.5 degrees Celsius) * Active malignant haematological disease * Known eating disorder (e.g., Anorexia nervosa, Bulimia nervosa) Exclusion Criteria for healthy volunteers \- Use of lipid lowering therapy