Influence of the Background Diet on Metabolism of Land-based n-3 PUFA

Inclusion Criteria: Whether participants meet the inclusion criteria will be evaluated by screening prior the run-in (blood sampling). * Females (in the menopause) and males (50 % each); age: 40 - 65 years; BMI \< 30 kg/m2 * Subjects must be able and willing to give written informed consent, and to comply with study procedures * Subjects with moderate elevated LDL cholesterol (\> 3 mmol/l), without lipid-lowering medication * Persons who consume a traditional "Western diet" composed of meat, sausage, dairy products, cereals, vegetables, fruits etc. * Precondition: stable eating habits at least one year before enrollment * Subjects must have adequate fluency in the German language to complete the questionnaires and understand the daily menu plans * No antihypertensive medication or stable dose for \>3 months prior to start of the study and during the entire study period Exclusion Criteria: * Subjects with any acute or chronic disease (tumor, infection, other), gastrointestinal diseases, diabe-tes mellitus (type I and II), chronic renal disease, diseases of the parathyroids, diseases necessitat-ing regular phlebotomies other chronic diseases which could affect the results of the present study * Use of medication which could affect the results of the present study including systemic glucocorti-coids, lipid-lowering medication * Hormone replacement therapy * Use of dietary supplements, incl. multivitamins, fish oil capsules, minerals, and trace elements (three months before and during the entire study period) * Weight loss or weight gain (\> 3 kg) during the last three months before study begin * Relevant food allergies (e.g. milk, nuts etc.) * Pregnancy or lactation * Transfusion of blood in the last three months before blood sample taking