Renin (Plasma Activity)
Renin is an enzyme produced by the kidneys that plays a key role in the renin-angiotensin-aldosterone system (RAAS), which regulates blood pressure, fluid balance, and electrolyte levels.
Category: Hormones
Also known as: renin, plasma renin activity, pra, renin activity, active renin, direct renin, Angiotensin forming enzyme
Reference range: 0.5–3.5 ng/mL/hr (Source: ABIM)
Standard unit: ng/mL/hr
High values may indicate
High renin levels may indicate renovascular hypertension, kidney disease, dehydration, heart failure, Addison's disease, or use of diuretics and ACE inhibitors.
Low values may indicate
Low renin levels may indicate primary aldosteronism (Conn's syndrome), excess salt intake, or use of certain antihypertensive medications such as beta-blockers.
Frequently asked questions
- What is a normal Renin (Plasma Activity) level?
- A typical reference range for Renin (Plasma Activity) is 0.5–3.5 ng/mL/hr (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is Renin (Plasma Activity) measured in?
- Renin (Plasma Activity) is most commonly reported in ng/mL/hr. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do Renin (Plasma Activity) 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 Renin (Plasma Activity) over time?
- Yes. Upload results from any lab and BloodId charts your Renin (Plasma Activity) over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: MedlinePlus, U.S. National Library of Medicine
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