Amino Acid Profile, Quantitative, Plasma

This test measures the levels of many different amino acids—the building blocks of proteins—in your blood. Amino acids come from the food you eat and are also made and broken down by your body. Abnormal levels can point to rare inherited conditions where the body cannot properly process certain amino acids, or they can reflect nutritional problems or liver and kidney issues. Because this test looks at many amino acids at once, doctors use the overall pattern to understand what may be happening. Your doctor will review your results alongside other tests and your medical history to determine if any follow-up is needed.

When elevated: Elevation of specific amino acids may indicate an inherited aminoacidopathy, urea cycle disorder, or organic acidemia requiring urgent metabolic evaluation; generalized hyperaminoacidemia may reflect severe hepatic dysfunction or protein catabolism. When low: Decreased concentrations of essential or branched-chain amino acids may suggest protein-energy malnutrition, malabsorption syndromes, or inadequate dietary intake; low glutamine may be seen in critical illness or following metabolic crises.

Amino acid profiles help athletes understand protein metabolism and recovery efficiency after training. Imbalances may indicate inadequate protein intake, overtraining stress, or liver stress from intense exertion—useful data for optimizing nutrition and training load, though routine screening is not standard practice for healthy athletes.