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A Simple Guide to Your Blood Sugar Chart and Normal Blood Sugar Levels
18 Sep 2025 By Eleanna O. De Filippis, M.D., Ph.D.

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A Simple Guide to Your Blood Sugar Chart and Normal Blood Sugar Levels

Understanding your blood sugar chart is crucial for managing your health, especially if you have diabetes or are at risk. This guide provides a straightforward explanation of blood sugar levels, what they mean, and how to interpret your blood sugar readings. We'll cover normal ranges, what to do if your levels are too high or too low, and how a blood sugar chart can help you stay healthy.

What is Blood Sugar and Why is it Important?

Blood sugar, also known as glucose, is the main type of sugar found in your blood and the primary source of energy for your body. It comes from the food you eat. Maintaining stable blood sugar levels is essential because: Understanding Your Blood Sugar Range What S Normal Vs Concerning

  • Energy: Your cells need glucose for energy to function correctly.
  • Organ Function: The brain, nerves, and other organs rely on a consistent supply of glucose.
  • Overall Health: Unstable blood sugar can lead to serious health complications like diabetes, heart disease, and kidney problems.

Understanding Your Blood Sugar Chart

A blood sugar chart is a record of your glucose levels over time. This chart helps you and your healthcare provider track trends, identify patterns, and make informed decisions about your treatment plan. It typically includes:

  • Date and Time: When the blood sugar level was measured.
  • Blood Sugar Level: The glucose reading, measured in milligrams per deciliter (mg/dL) or millimoles per liter (mmol/L).
  • Meal Information: What you ate and when.
  • Medication: Any medications taken and their dosages.
  • Activity: Any exercise or physical activity performed.
  • Notes: Any other relevant information, such as stress levels or illness.

Keeping a detailed blood sugar chart allows you and your doctor to assess the effectiveness of your diabetes management plan and make necessary adjustments.

Normal Blood Sugar Levels

Understanding normal blood sugar levels is the first step in interpreting your chart. These levels can vary depending on when you check your blood sugar:

  • Fasting Blood Sugar (FBS): Measured after at least eight hours of not eating (typically first thing in the morning).
  • Postprandial Blood Sugar (PPBS): Measured two hours after starting a meal.
  • HbA1c: Provides an average blood sugar level over the past 2-3 months. This is a blood test done at a doctor's office or lab.

Here's a general guide to normal blood sugar ranges for adults without diabetes:

Test Normal Range (mg/dL) Normal Range (mmol/L)
Fasting Blood Sugar (FBS) Less than 100 Less than 5.6
Postprandial Blood Sugar (PPBS) Less than 140 Less than 7.8
HbA1c Less than 5.7% Less than 5.7%

Note: These ranges can vary depending on individual factors, such as age, medical conditions, and medications. Always consult with your healthcare provider for personalized target ranges.

Blood Sugar Levels for People with Diabetes

For individuals with diabetes, target blood sugar levels may be slightly different. Generally, the recommended ranges are: Warning Signs Of Hyperglycemia 9 High Blood Sugar Symptoms To Know

  • Fasting Blood Sugar: 80-130 mg/dL (4.4-7.2 mmol/L)
  • Postprandial Blood Sugar: Less than 180 mg/dL (10.0 mmol/L)
  • HbA1c: Less than 7%

It's essential to work closely with your healthcare team to determine your individual target range and create a plan to achieve it.

What To Do If Your Blood Sugar is Too High (Hyperglycemia)

Hyperglycemia, or high blood sugar, occurs when your glucose levels are higher than your target range. Symptoms can include: Mistakes To Avoid 5 Surprising Factors Affecting Your Blood Sugar Levels

  • Increased thirst
  • Frequent urination
  • Blurred vision
  • Fatigue
  • Headache

If you notice these symptoms, check your blood sugar immediately. If it's consistently high, take the following steps:

  1. Drink Water: Stay hydrated to help flush out excess sugar.
  2. Exercise: Engage in light physical activity, such as walking, but avoid strenuous exercise if your blood sugar is very high (above 240 mg/dL) and you have ketones in your urine.
  3. Adjust Medication: If you take insulin or oral diabetes medications, follow your doctor's instructions for adjusting your dosage.
  4. Contact Your Doctor: If your blood sugar remains high despite your efforts, contact your healthcare provider for guidance.

What To Do If Your Blood Sugar is Too Low (Hypoglycemia)

Hypoglycemia, or low blood sugar, occurs when your glucose levels drop below your target range (typically below 70 mg/dL). Symptoms can include:

  • Shakiness
  • Sweating
  • Dizziness
  • Confusion
  • Irritability
  • Hunger

If you experience these symptoms, check your blood sugar right away. If it's low, follow the "15-15 rule":

  1. Eat or Drink 15 Grams of Fast-Acting Carbohydrates: Examples include glucose tablets, fruit juice, regular soda, or hard candy.
  2. Wait 15 Minutes: Recheck your blood sugar after 15 minutes.
  3. Repeat If Necessary: If your blood sugar is still low, repeat the process until it returns to the target range.
  4. Eat a Meal or Snack: Once your blood sugar is back to normal, eat a meal or snack to prevent another drop.
  5. Contact Your Doctor: If you experience frequent or severe episodes of hypoglycemia, consult with your healthcare provider.

Tips for Maintaining Healthy Blood Sugar Levels

Maintaining stable blood sugar levels requires a comprehensive approach that includes:

  • Healthy Diet: Eat a balanced diet that is rich in fruits, vegetables, whole grains, and lean protein. Limit sugary drinks, processed foods, and saturated fats.
  • Regular Exercise: Aim for at least 30 minutes of moderate-intensity exercise most days of the week. Physical activity helps improve insulin sensitivity and lower blood sugar.
  • Medication Management: If you have diabetes, take your medications as prescribed and follow your doctor's instructions carefully.
  • Stress Management: Practice stress-reducing techniques, such as yoga, meditation, or deep breathing exercises. Stress can affect blood sugar levels.
  • Regular Monitoring: Check your blood sugar regularly as directed by your healthcare provider and keep a detailed blood sugar chart.

The Importance of Regular Monitoring and Doctor Visits

Regular monitoring and consistent doctor visits are vital for managing your blood sugar levels. The blood sugar chart you create provides valuable information that your doctor can use to make adjustments to your treatment plan. Regular check-ups also help identify and address any potential complications early on. Remember, taking an active role in managing your blood sugar is crucial for long-term health and well-being. ```

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