Nutrient Bioavailability From Microalgae

Inclusion Criteria: * females and males * BMI \< 30 kg/m2 * subjects must be able and willing to give written informed consent, and to comply with study procedures * participants following a traditional Western diet composed of dairy products, sausage, meat, fast foods, chocolate and snacks, cereals, vegetables, and fruits (PAL: 1.6) * precondition: Stable eating habits of at least one years before enrolment * subjects must have adequate fluency in the German language to complete the questionnaires and understand the nutritional recommendations Exclusion Criteria: * subjects with any acute or chronic disease (CVD, tumor, infection, other), gastrointestinal diseases, diabetes mellitus (type I and II), chronic renal disease, diseases of the parathyroid, diseases necessitating regular phlebotomies other chronic diseases which could affect the results of the present study * use of prescription medicine which could affect results of the study, including systemic glucocorticoids * intake of lipid-lowering drugs, diabetes medication, hormone replacement therapy * estimated glomerular filtration (eGFR) rate \< 60 ml/min * weight loss (≤ 3 kg) or weight gain (≥ 3 kg) during the last three months before study begin * pregnancy or lactation * transfusion of blood in the last three months before blood sample taking * use of dietary supplements incl. multivitamins, fish oil capsules, minerals, and trace elements (three months before and during the entire study period) * vegetarians, ve…