Urine Metabolites TestDried urine is a form of collection where patients saturate a filter card with a urine sample. Once dry, urine cards are extremely stable for shipment and storage, and this method eliminates the need for jug urine collection. Why measure in urine? Urine testing is the best way to measure adrenal and sex steroid hormone by products and their respective metabolic pathways, providing a gauge for understanding the bodys hormone metabolism. Urine testing