A metabolic disorder results when an enzyme responsible for the breakdown of our food is defective which results in compounds, also known as metabolites, accumulating in urine. Incorrect metabolism means your body might have too much or too little of a metabolite which can have detrimental impacts on normal growth and development. The urine metabolic screen is a series of simple tests that can be used to suggest particular metabolic disorders. The screen includes: Urine organic acids. Urine qualitative amino acids.