 The main objective of the study was nutritional and toxicological health risk evaluation among long-term vegans with emphasis on cumulative exposure to pesticides. Main research methods include: measurement of food intake by using three days food record, measurement of nutritional and toxicological bio-markers on blood, serum and plasma. Nutritional biomarkers include following plasma serum measurements: concentrations of vitamins vitamin E, D2, D3, B12 and beta-carotene, iron, iodine, selenium, fatty acids and polyphenols. Toxicological measurements include nitrate, pesticides and DNA-adducts. 