This article was reviewed by Felix Gussone, MD. Key Takeaways: Preparing properly for lab tests helps ensure your results are accurate and reliable. Some tests — ...

This is read by an automated voice. Please report any issues or inconsistencies here. You don’t feel like yourself. Maybe you’re low on energy, you’re not sleeping well, or your mood feels harder to ...

Your doctor says everything looks fine, but you still feel terrible. The problem might not be your health but how labs define “normal.” Understanding the difference between normal and optimal could ...

Higher than normal blood ammonia levels are called hyperammonemia. Acceptable levels depend on age and sex but range from about 42 µg/dL in infants to 200 µg/dL adults assigned male at birth. When you ...

Insulin is one of the most essential hormones in your body. You can think of it as a “key” that unlocks the doors to your cells. When you eat food, your body turns it into energy (sugar). Insulin ...