For you mineral test - Blood test for home The for you blood test tests the following values: Iron, calcium, iodine, potassium, copper, magnesium, sodium, phosphate, selenium and zinc. The self-tests from for you eHealth are based on a very simple principle: Test at home. Send by post. View the laboratory analysis online in an easy-to-understand format. Identify deficiencies. Follow the individual optimization and action recommendations.