Albumin — The Protein That Carries Everything Else
Albumin is the main protein in your blood: it keeps fluid inside the vessels and helps carry hormones, vitamins and enzymes — and it changes how total calcium on the same panel is read.
Albumin is the main protein in your blood — made by the liver, it keeps fluid inside the blood vessels and helps carry hormones, vitamins and enzymes, and it is reported on the comprehensive metabolic panel. It also changes how the total calcium result on the same panel should be read.
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Albumin is the main protein in your blood, made by the liver.
Transcript & sources → All videosMr. Age is AgeGen's editorial character. Facts come from the protocol above.
The biomarker
- Name: Serum Albumin
- Units: g/dL
- Standard range: about 3.4–5.4 g/dL (ranges vary by lab); reported on the comprehensive metabolic panel.
How to read your result
| Pattern | What it can mean |
|---|---|
| Low | Can be a sign of liver or kidney disease, of not being well nourished, or of a digestive disease that affects using protein from food, such as Crohn's disease — the cause is worked out clinically, not from the number alone. |
| Raised | May be a sign of dehydration. |
| Carrier effect | About half the calcium in blood is attached to proteins, mainly albumin, so an abnormal albumin changes the total calcium result; a separate ionized calcium test may be needed. |
| Paired with urine ACR | Albumin in urine is a separate test (urine microalbumin creatinine ratio); abnormal amounts there may be an early sign of kidney disease. |
What moves the needle
- Do not act on a low albumin as an instruction to buy protein powder. Protein intake is only one of several candidate causes and is not the default answer.
- If low, the follow-up depends on the cause — read alongside total protein, liver enzymes and, where kidney loss is the question, urine ACR.
- Arrive normally hydrated. A dehydrated draw raises the value.
Why this test is worth asking for
- It is part of the standard comprehensive metabolic panel, so it is usually already in your results.
- It changes how other results on the same panel — total calcium especially — should be read.
Sources
- MedlinePlus — Albumin Blood Test
- MedlinePlus — Comprehensive Metabolic Panel (CMP)
- MedlinePlus — Albumin blood (serum) test
- MedlinePlus — Calcium, ionized
- MedlinePlus — Microalbumin Creatinine Ratio
AgeGen lab guides are educational only. We do not provide medical diagnosis, prescribe brands, or recommend specific doses. Talk to a licensed clinician before changing your supplement or medication routine.
