Test library
Plasma Amino Acid Panel
The Amino Acid Profile Blood Test measures the levels of up to 34 individual amino acids in a blood sample. It is used to detect deficiencies and to support the evaluation of inherited conditions that affect amino acid processing.
Order Amino Acids Blood Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Amino Acids Blood Test- Typical turnaround
- 1-3 business days
- Starting price
- From $249
- Results
- Confidential, online
Quick answer
The Amino Acid Profile Blood Test is a panel that measures the concentration of individual amino acids in the blood. Amino acids are the building blocks of proteins and also serve as precursors for many molecules in the body. This test is used when a metabolic or nutritional problem is suspected, and it can help identify patterns that point to inherited conditions or deficiencies. Results are interpreted by a qualified healthcare provider.
What this test measures
Amino acids are the units that make up proteins, and they also participate in energy production and the synthesis of hormones and neurotransmitters. The body maintains each amino acid within a fairly narrow range. When a specific enzyme or transport pathway does not work as expected, levels can rise or fall in characteristic patterns that a laboratory panel can detect.
This blood panel typically reports around 34 amino acids individually, which may include essential amino acids such as leucine, valine, and phenylalanine, along with non-essential ones such as glycine and alanine. The sample is a blood draw, and results are compared with age-appropriate reference ranges. Some laboratories also offer a companion urine amino acid profile for additional information.
Testing is requested when a clinician suspects an inborn error of metabolism, a nutritional deficiency, or another condition that disturbs amino acid balance. Symptoms may include unusual fatigue, feeding difficulties in infants, developmental concerns, or unexplained illness. A qualified healthcare provider interprets the pattern alongside other tests and clinical findings.
- Alanine
- Arginine
- Asparagine
- Aspartic acid
- Citrulline
- Glutamic acid
- Glutamine
- Glycine
- Histidine
- Isoleucine
- Leucine
- Lysine
Why people order this test
- Investigate suspected inborn errors of amino acid metabolism
- Evaluate unexplained fatigue, developmental, or feeding concerns
- Assess nutritional status when deficiency is suspected
- Monitor a known metabolic condition over time
- Follow up on abnormal newborn screening results
- Support evaluation of liver or kidney-related amino acid changes
How to prepare
Fasting may be requested depending on the laboratory and the tests ordered, so follow the instructions you receive. A blood sample is drawn from a vein, usually in the morning. Tell the ordering provider about any medications, supplements, or recent meals because these can influence amino acid levels.
Understanding your results
Results are typically available within one to three business days. The report lists each amino acid with its value and reference range, and the clinician looks for patterns rather than isolated numbers. A qualified healthcare provider can explain what the findings mean and whether additional testing is needed.
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Frequently Asked Questions
What are amino acids?
They are the building blocks of proteins and are also used to make other molecules. The body needs a balanced supply for normal growth and function.
Why measure 34 amino acids at once?
Looking at many amino acids together reveals patterns that can point to a specific metabolic pathway problem, which a single measurement might miss.
Does this test require fasting?
Some laboratories request fasting and others do not, so follow the preparation instructions provided with your order.
Can diet affect the results?
Yes. Recent meals, supplements, and overall nutrition can influence amino acid levels, which is why the ordering provider reviews the results in context.
Is this test used for newborns?
Newborn screening programs use related tests. This panel may be ordered as follow-up or for older children and adults with specific concerns.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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