Albumin

Description

Albumin is the most abundant protein in the blood. It’s made by the liver and has two major jobs: (1) helping maintain fluid balance inside blood vessels (oncotic pressure) and (2) transporting hormones, fatty acids, and medications through the bloodstream.

Why it matters

Albumin is a broad marker of overall physiologic status. Low albumin can reflect reduced liver protein synthesis, protein loss (kidneys or gut), inflammation/illness, or undernutrition. High albumin is most often a sign of dehydration/hemoconcentration rather than “too much protein.”

What low albumin can suggest (general education)

• Liver dysfunction or advanced liver disease

• Kidney protein loss (e.g., nephrotic patterns)

• Chronic inflammation or acute illness

• Malnutrition or malabsorption

• Significant fluid overload (dilutional)

Practical interpretation

Albumin is best interpreted with total protein, globulin, A/G ratio, liver enzymes, and kidney markers. A single abnormal value is often rechecked under typical hydration/illness conditions.

Educational only, not medical advice. Persistent low albumin or symptoms like swelling, unexpected weight change, or fatigue should be evaluated by a clinician.