NT-proBNP
Cardiac stress and volume-overload marker - useful ruling out heart failure and monitoring cardiac strain.
How NT-proBNP ranges relate
The standard lab range vs the optimization-focused target. Illustrative trajectory shows what a 12-week improvement pattern looks like — not real user data.
What NT-proBNP Measures
NT-proBNP is released by cardiac ventricular myocytes when they stretch - classically under volume overload or elevated filling pressures. It is the primary biomarker used to rule out heart failure in dyspneic patients in the ED, and has growing use in outpatient risk assessment.
Values rise with age, kidney disease, atrial fibrillation, and obesity-adjusted cut-offs apply. Very low values (<125 in under 75) have a strong negative predictive value for heart failure.
What Affects This Biomarker
NT-proBNP is influenced by: cardiac filling pressures, age (rises with age), kidney function (retention raises it), obesity (lowers it), AF, and physical conditioning. Rises acutely with exacerbations; trends over time matter more than single values.
In the Context of Peptide Protocols
Useful as a baseline for anyone on GH-axis peptides (which can cause water retention), GLP-1s (to establish cardiac baseline before weight-loss-induced changes), or with family history of cardiomyopathy. Trend over years matters more than isolated values.
Peptides That Commonly Move NT-proBNP
Upload any lab PDF and MyProtocolStack maps your values to NT-proBNP and 40+ other biomarkers. StackAI interprets the trend in context of your protocol.
Start tracking →Informational only - not medical advice. Reference ranges vary by lab and individual context. Work with a licensed provider to interpret your specific results.