BNP
BNP (B-type natriuretic peptide) is a hormone produced by the heart when it is stretched or overloaded. It helps evaluate heart function.
Category: Cardiac Markers
Also known as: bnp, b-type natriuretic peptide, brain natriuretic peptide
Reference range: 0–100 pg/mL (Source: ABIM)
Standard unit: pg/mL
High values may indicate
High BNP levels may indicate heart failure, cardiac dysfunction, pulmonary hypertension, or acute coronary syndrome.
Low values may indicate
Low BNP levels are normal and help rule out heart failure as a cause of symptoms like shortness of breath.
Frequently asked questions
- What is a normal BNP level?
- A typical reference range for BNP is 0–100 pg/mL (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is BNP measured in?
- BNP is most commonly reported in pg/mL. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do BNP 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 BNP over time?
- Yes. Upload results from any lab and BloodId charts your BNP over time against its reference range, so you can see whether the trend is rising, falling, or stable.