Zinc Absorption From Zinc Citrate, Zinc Gluconate and Zinc Oxide

Inclusion Criteria: * Male or female of 18 to 45 years old * Body Mass Index in the range of 19 to 25 * No mineral and vitamin supplements two weeks prior to the study and during the whole duration of the study Exclusion Criteria: * Any metabolic, gastrointestinal or chronic disease (according to the subjects own statement) * Long-term medication during the whole study (except for contraceptives) * Vegans * Pregnancy * Lactation * Intention to become pregnant during the course of the study * Lack of safe contraception * Consumption of mineral and vitamin supplements within 2 weeks prior to 1st test supplement administration * Earlier participation in any nutrition study using Zn stable isotopes as well as participation in any other clinical study within the last 30 days and during this study