Hair Amino Acid Profile (Substance Concentration)
This test measures the levels of specific amino acids found in hair, which can help assess overall protein metabolism and potential nutritional deficiencies.
["Hair amino acid testing may provide insights into long-term protein balance and metabolic health."]
Key facts at a glance
- LOINC
- 50160-1
- Short code
- Deprecated Amino acids Hair-sCnc
- Synonyms
- Deprecated Amino acids Hair-sCnc
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What Is Hair Amino Acid Testing Used For?
Hair contains amino acids that reflect long-term dietary protein intake and metabolic processes. This test can help identify imbalances that may indicate conditions like protein malnutrition, metabolic disorders, or certain genetic conditions. It’s sometimes used in research or specialized clinical settings to evaluate systemic amino acid status over time, though it’s not a routine diagnostic tool for most health concerns.
How Is the Sample Collected?
A small sample of hair (typically a few strands or a section cut from the scalp) is collected. No special preparation is needed, but you may be asked to avoid certain hair treatments (like dyes or relaxers) before testing to ensure accurate results.
What Does the Test Measure?
The test analyzes the concentration of amino acids in hair, which can include essential and non-essential amino acids. These amino acids are building blocks of proteins and reflect how your body processes nutrients over time. Results may be reported as qualitative (qualitative assessment) or quantitative (concentration levels), depending on the lab’s method.
When Might This Test Be Ordered?
A healthcare provider may recommend this test in specialized cases, such as evaluating long-term nutritional status in individuals with chronic illnesses, monitoring metabolic conditions, or assessing potential genetic disorders related to amino acid metabolism. It’s less common for routine screening but may be considered in research or advanced clinical scenarios.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Hair amino acid testing can provide indirect clues about protein metabolism, but it’s not a direct measure of current blood levels. Elevated or low levels of specific amino acids in hair may suggest underlying metabolic imbalances, dietary deficiencies, or conditions like phenylketonuria (PKU) or other aminoacidopathies. However, results should always be interpreted in the context of clinical symptoms and other diagnostic findings. This test is not a substitute for standard blood tests or clinical evaluations.
Short name
Hair Amino Acid Test
Frequently asked questions
Why would my doctor order this test?
What does a hair amino acid test involve?
Are there any risks or side effects?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy