The Influence of Different Food Componente on Zinc Absorption in Young Adults Consuming Zinc Fortified Porridges Prepared From Maize, Beans and Sorghum: a Series of Six Similar Randomized, Single-blind Studies

Inclusion criteria: 1. Male or female of 18 to 45 years old 2. Body Mass Index in the range of 19 to 25 3. No mineral and vitamin supplements two weeks prior to the study and during the whole duration of the study Exclusion criteria: 1. Any metabolic, gastrointestinal or chronic disease (according to the subjects own statement) 2. Long-term medication during the whole study (except for contraceptives) 3. Smoking 4. Pregnancy 5. Lactating 6. Earlier participation in any other clinical study within the last 30 days * Subject Withdrawal: * Incomplete consumption of test meal * Missing of test meal Missing of iv dose * Incomplete urine collection (studies 2-6); exceptions to be discussed for study 1 * No blood sample at start of study * Consumption of food within 3 hours after iv dose - to be evaluated * Vomiting within 3 hours after test meal administration - to be evaluated * Sick subjects and subjects taking any medication during study - to be evaluated (postponement of test meal possible)