A normal urea level in the blood, also known as blood urea nitrogen (BUN), can range from 6 to 24 mg/dL (2.1 to 8.5 mmol/L). However, the normal range may vary slightly depending on the laboratory's reference range.
Urea is a waste product produced by the body when protein is broken down. It is filtered out of the blood by the kidneys and excreted in urine. If the kidneys aren't working properly, urea can build up in the blood, leading to a high BUN level.
Here are some factors that can affect BUN levels:
- Protein intake: Higher protein intake leads to higher BUN levels.
- Hydration: Dehydration can also lead to higher BUN levels.
- Liver function: The liver plays a role in producing urea. Liver disease can affect BUN levels.
- Kidney function: As mentioned, kidney disease can lead to higher BUN levels.
If your BUN level is outside the normal range, it doesn't necessarily mean you have a problem. Your doctor will consider your individual circumstances and other test results before making a diagnosis.
