Free Amino Acid Profile (24-Hour Urine Collection) – Specific Amino Acid Concentrations

Why This Test Is Done

Your doctor may order this test if you have symptoms like fatigue, muscle weakness, or unexplained weight changes. It could also be recommended if you have a family history of metabolic disorders or if certain genetic conditions are suspected. Some conditions, like phenylketonuria or maple syrup urine disease, require monitoring amino acid levels early in life.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period, typically starting after your first morning urine. Store samples in a refrigerator and return them to the lab on the same day. Follow your doctor’s instructions carefully to ensure accurate results.

What the Test Involves

After collecting urine samples, the lab will analyze the fluid for specific amino acids using advanced techniques like high-performance liquid chromatography (HPLC). This helps identify imbalances or unusual patterns in your metabolism.

What the Results Mean

Results show the concentration of each amino acid measured. Elevated or low levels may indicate metabolic disorders, kidney issues, or other health concerns. Your doctor will interpret the results in the context of your symptoms and medical history.