Understanding Which Blood Sugar Metrics to Monitor

Blood sugar, short for blood glucose, is a key indicator of metabolic health. Clinically, there are two primary methods for measuring blood glucose: venous blood sampling and using a glucose meter to test capillary blood from the fingertip. Venous blood collection is typically performed in a hospital or clinic and measures glucose levels in either plasma or serum. On the other hand, home glucose meters measure whole blood glucose levels, which can sometimes differ slightly from plasma values.

How to Interpret Blood Sugar Levels

When determining whether blood sugar levels are within the normal range, healthcare professionals generally rely on results obtained from venous blood tests. These results are more accurate and standardized for diagnostic purposes. In laboratory reports, the term "Glucose" or the abbreviation "GLU" will be used to indicate the measured glucose level, which directly reflects your blood sugar status.

Signs That You Should Get Your Blood Sugar Checked

If you experience symptoms such as dry mouth, increased thirst, frequent urination, unexplained weight loss, fatigue, or weakness, it's advisable to consult a healthcare provider. These symptoms could be indicators of abnormal blood sugar levels, and a qualified medical professional can perform the necessary tests to evaluate your condition and provide an accurate diagnosis.

Why Accurate Testing Matters

While home glucose meters are convenient for regular monitoring, especially for individuals managing diabetes, it's important to cross-check results with professional lab tests when necessary. Understanding the difference between whole blood and plasma glucose values can help you better interpret your results and communicate effectively with your doctor.