# Magnesium, RBC

> This test measures the amount of magnesium found inside your red blood cells rather than in the liquid part of your blood. It helps show whether your body has enough stored magnesium, which is useful because standard blood tests can sometimes appear normal even when your total levels are low. This measurement helps doctors determine if symptoms like muscle weakness, cramps, or fatigue are caused by a lack of magnesium. However, it does not identify the specific cause of the deficiency or diagnose underlying medical conditions on its own.

- Labcorp code: 080283
- Category: [Nutrients](https://app.picardo.health/labs/tests/nutrients.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=080283&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.