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Understanding Blood Glucose Level: Why Monitoring Blood Sugar Matters?


Blood glucose, or blood sugar, is an important biomarker that indicates one’s metabolic health. Measuring and understanding blood glucose levels is crucial for managing conditions like diabetes and preventing complications. This article will provide an overview of what blood glucose is, the normal range, and the significance of monitoring it.

Understanding Blood Glucose Level 

Glucose is a simple sugar that serves as the most important source of energy for the cells in our bodies. It mainly comes from digesting carbohydrates from foods. Blood glucose levels indicate the amount of glucose being transported in the blood to the cells. 

Blood Glucose Level 

The normal blood glucose range for a fasting individual is between 70-100 mg/dL. For non-fasting individuals, up to 140 mg/dL is considered normal. Levels are usually lowest in the morning before eating and rise after meals. Chronic high blood glucose is termed hyperglycemia and may indicate diabetes if above 126 mg/dL when fasting. Hypoglycemia refers to abnormally low blood sugar below 70 mg/dL and can lead to complications if untreated.

The body aims to maintain blood glucose within the normal range. Insulin and glucagon are hormones secreted by the pancreas that regulate blood sugar. Insulin lowers blood glucose by promoting the storage and utilization of glucose by cells, while glucagon raises levels by stimulating glucose release into the bloodstream.

The Significance Of Blood Sugar Measurements

Given the role of blood glucose in energy production and its regulation by insulin, monitoring blood sugar levels is vital for both medical professionals and patients.

For medical professionals, measuring blood glucose is crucial for screening, diagnosing, and monitoring patients with diabetes. Elevated HbA1c, a measure of average blood sugar over months, can diagnose diabetes. Subsequently, regular monitoring of fasting glucose and post-meal glucose can guide treatment and medication adjustments in diabetics.

For patients, self-monitoring with glucometers is important for those with diabetes to achieve better control over their blood sugar. Checking glucose multiple times a day helps diabetics determine diet, exercise, and insulin needs to keep levels in range. This can prevent hyperglycemia and hypoglycemia. Increasingly, continuous glucose monitors are being used to track glucose fluctuations.

Even for non-diabetics, periodic blood sugar testing can uncover early signs of prediabetes or diabetes for prompt intervention. Monitoring glucose levels is particularly useful during illness, surgery, pregnancy, or when new medications are started to prevent spikes and dips.

Therefore, blood glucose measurements through medical tests or self-monitoring provide vital information to guide treatment decisions and empower patients to self-manage conditions like diabetes.

Also Read: Does Creatine Make You Gain Weight? What Is The Truth?


Blood glucose is tightly regulated in the body and serves as an important energy source for cells. Measuring blood sugar levels within the normal 70-140 mg/dL range is essential for evaluating metabolic health. Routine testing allows early detection of hyperglycemia to prevent diabetes complications. For diabetic patients, regular monitoring of blood glucose is crucial to make informed decisions about insulin, diet, and lifestyle for optimal health.


1. What are normal blood sugar levels?

Normal blood glucose levels range between 70-140 mg/dL throughout the day for non-diabetics. For fasting individuals, 70-100 mg/dL is considered normal. 

2. How often should you check your blood sugar? 

For diabetics, checking blood glucose levels multiple times, ideally, 4-6 times a day, enables optimal control of blood sugar. For non-diabetics, periodic checks or during illness provide insight into metabolic health.

3. What causes high blood sugar?

Diabetes, prediabetes, lack of insulin, pancreatitis, infections, stress, steroids, and pregnancy can cause high blood glucose. Lifestyle factors like diet, inactivity, and being overweight also contribute to elevated blood sugar.

4. How can you lower blood sugar quickly?

To quickly lower high blood sugar, light exercise like walking can stimulate glucose utilization. Drinking water and taking prescribed insulin or other glucose-lowering medications can also help lower levels.

5. What are the symptoms of low blood sugar? 

Hypoglycemia can cause shakiness, irregular heartbeat, nervousness, hunger, sweating, irritability, anxiety, fatigue, dizziness, or tingling. Treating low blood sugar involves consuming fast-acting carbohydrates.

Dr. Harold Gojiberry is not just your ordinary General Practitioner; he is a compassionate healthcare provider with a deep commitment to patient well-being and a passion for literature. With extensive medical knowledge and experience, Dr. Gojiberry has made a significant impact in the field of healthcare, particularly in the area of liver diseases and viral hepatitis.

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