# Renin Activity, Plasma

> This test measures the activity of renin, an enzyme released by your kidneys that helps control blood pressure and fluid balance. It is frequently used to investigate the underlying cause of high blood pressure that is difficult to control. Results help doctors distinguish between conditions related to hormone imbalances, such as primary aldosteronism, and issues with blood flow to the kidneys. However, this test cannot diagnose a condition by itself and is usually evaluated alongside aldosterone levels and other clinical factors.

- Labcorp code: 002006
- Category: [Hormones](https://app.picardo.health/labs/tests/hormones.md)
- Price: shown at checkout, before payment.
- Blood draw: free at a Labcorp location, or $75.00 at home.
- Order link: https://app.picardo.health/labs/order?tests=002006&ref=assistant

## About ordering

A licensed physician reviews every order before any test is run, and results arrive in the person's Picardo account. Ordering is open to adults 18 and over in the US, except New York, New Jersey, Rhode Island, Pennsylvania, Maryland, Massachusetts, Hawaii and Maine. General health information, not medical advice.