Vitamin A, retinol — lab reference
In the reference guideFasting, liver function, inflammation, and carrier proteins matter.
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What’s searchable?Fasting, liver function, inflammation, and carrier proteins matter.
Supports vision, immune function and tissue development.
<150 supports deficiency; 150-400 is often treated as borderline and may warrant MMA/homocysteine review.
Fasting and supplement abstention improve interpretability.
Recent supplementation can elevate; very high values may be clinically relevant.
Interpret relative to lipids when appropriate; assay-specific.
Highly preanalytic-sensitive. Fasting, processing, and recent intake matter.
Ask your clinician to read this result with kidney function, calcium, vitamin D, and PTH.
Not a routine vitamin D status test. Ask your clinician to read this result with calcium, phosphorus, kidney function, and PTH.
Reagent-specific. Ask your clinician to read this result with INR, liver function, vitamin K, and anticoagulants.
Ask your clinician to read this result with calcium, phosphorus, magnesium, vitamin D, and kidney function.
Your lab may use its own range. Symptoms, medicines, and the types of white blood cells also matter.
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