Prealbumin
Prealbumin (transthyretin) is a protein made by the liver that helps transport thyroid hormones and vitamin A. It is used as a sensitive marker of nutritional status and liver function.
Category: Liver Function
Also known as: prealbumin, transthyretin, ttr, pre-albumin, Pre albumin
Reference range: 20–40 mg/dL (Source: ABIM)
Standard unit: mg/dL
High values may indicate
High prealbumin may indicate corticosteroid use, Hodgkin's disease, or kidney dysfunction causing impaired excretion.
Low values may indicate
Low prealbumin may indicate malnutrition, liver disease, inflammation, infection, or hyperthyroidism.
Frequently asked questions
- What is a normal Prealbumin level?
- A typical reference range for Prealbumin is 20–40 mg/dL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Prealbumin measured in?
- Prealbumin is most commonly reported in mg/dL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Prealbumin reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track Prealbumin over time?
- Yes. Upload results from any lab and BloodId charts your Prealbumin over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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