Blood sugar, also called blood glucose, is the body’s energy source. The body uses glucose from food to fuel muscles, brain, and organs throughout the day.
Keeping blood sugar within a range is really important for our overall health. It can help lower the risk of getting conditions like prediabetes, Type 2 diabetes, heart disease, and nerve damage.
What Are Normal Blood Sugar Levels?
Normal Blood Sugar Levels Chart
The U.S. Centers for Disease Control and Prevention (CDC) says that normal blood sugar levels for adults are usually:
Blood Sugar Levels Chart: Understanding Your Numbers
Fasting Blood Sugar Levels
Fasting blood sugar levels measure the glucose in our blood after we have not eaten for at least 8 hours. Doctors often do this test during exams or when we get preventive lab work.
70-99 mg/dL
If our fasting blood sugar is between 70 and 99 mg/dL, a fasting glucose test can help doctors determine whether we have prediabetes or diabetes.
There are reasons why doctors do fasting blood sugar tests, including:
- Routing preventive healthcare
- If we have a family history of diabetes
- If we are obese or overweight
- If we have blood pressure or cholesterol
- If we have symptoms of high blood sugar
Blood Sugar Levels After Eating
Our blood sugar levels naturally go up after we eat. In adults, blood sugar levels two hours after a meal are usually less than 140 mg/dL.
2-Hour Post-Meal Glucose: Should be less than 140 mg/dL
Many things can affect what our blood sugar levels are after we eat, including:
- How many carbohydrates do we eat
- How big are our portions
- How much physical activity do we do
- How stressed we are
- What medications do we take
- If we have any conditions
Hemoglobin A1C Levels
The A1C test measures our average blood sugar over the past 2 to 3 months.
A1C, below 5.7%
If our A1C is high, it might mean we have prediabetes or diabetes.
What Causes Blood Sugar Levels?
High blood sugar, also called hyperglycemia, can develop gradually.
Common Risk Factors
Several risk factors for diabetes may increase the chances of developing high blood sugar levels:
- Family history of diabetes
- Overweight and obesity
- Sedentary lifestyle
- High blood pressure
- Cholesterol
- History of gestational diabetes
- Poor dietary habits
- Increasing age
Conditions That Can Affect Blood Sugar
Blood sugar may also rise because of:
- Prediabetes
- Type 2 diabetes
- Stress and illness
- Certain medications, including steroids
- Hormonal conditions
Symptoms of High Blood Sugar You Shouldn’t Ignore
Common Warning Signs
The National Institute of Diabetes and Digestive and Kidney Disease explains that symptoms of high blood sugar may include:
- Increased thirst
- Frequent urination
- Fatigue
- Blurry vision
- Unexplained weight loss
- Slow-healing cuts or wounds
- Frequent infections
When Symptoms May Be Subtle
Some patients experience no symptoms or only very mild symptoms.
If you notice signs of diabetes, it is essential to schedule an appointment with a primary care provider for evaluation and testing.
What Causes Low Blood Sugar Levels?
Low blood sugar, also called hypoglycemia, can happen in people with or without diabetes.
Common Causes
Low blood sugar levels may occur because of:
- Skipping meals
- Diabetes medications
- Excessive exercise
- Alcohol use
- Certain medical conditions
Symptoms of Low Blood Sugar
Common hypoglycemia symptoms include:
- Sweating
- Shaking
- Dizziness
- Confusion
- Rapid heartbeat
- Hunger
- Weakness
Severe low blood sugar can become dangerous if left untreated.
Who Should Have Their Blood Sugar Checked
Adults Who Should Be Screened
According to MedlinePlus, many adults benefit from routine diabetes screening, especially:
- Adults age 35 and older
- Overweight or obese adults
- People with a family history of diabetes
- Adults with high blood pressure
- Women with a history of gestational diabetes
- Individuals with high cholesterol or heart disease risk factors
Why Regular Primary Care Visits Matter
Routine primary care visits help with:
- Early detection of prediabetes
- Diabetes prevention
- Monitoring long-term health risks
- Personalized wellness planning
- Preventive healthcare guidance
A primary care physician can also help track changes in your blood sugar over time and recommend lifestyle changes before diabetes develops.
How a Primary Care Doctor Helps Keep Blood Sugar Healthy
Preventive Care Approach
Primary care providers focus on prevention and long-term health management through:
- Annual wellness visits
- Preventive lab testing
- Diabetes screening
- Weight management guidance
- Nutrition counseling
- Medication management
- Chronic disease monitoring
Benefits of Having a Primary Care Provider
Having an ongoing relationship with a family doctor or primary care provider offers several benefits:
- Continuity of care
- Earlier disease detection
- Better long-term health monitoring
- Personalized treatment recommendations
- Easier coordination of specialty care if needed
When to Schedule a Primary Care Appointment
You should schedule a primary care appointment if:
- Your blood sugar readings are consistently elevated
- You have symptoms of high or low blood sugar
- You have risk factors for diabetes
- You have not had preventive blood work within the last year
- You want guidance on diabetes prevention or weight management
Early intervention may help prevent long-term complications and improve overall health outcomes.
At Zenith Primary & Urgent Care, we provide both primary care and urgent care services for patients in Marlborough, Hudson, Northborough, Southborough, Framingham, Westborough, and surrounding MetroWest communities.
Zenith Primary Care is accepting new patients and offers:
- Same-day or next-week appointments
- Check-ups and wellness visits
- Urgent care services
- Lab testing and specialist referrals
- Evening and weekend appointments
For many patients, blood sugar concerns may be associated with conditions such as high blood pressure, obesity, stress, hormonal changes, medication side effects, or underlying diabetes risk factors. Having urgent care and primary care in one location makes it easier to receive both immediate evaluation and long-term follow-up when needed.
If you are looking for a primary care doctor in Marlborough, Zenith Primary & Urgent Care offers convenient access to ongoing care and same-day medical visits in one place.
You can call 627-500-7933 or book an appointment here.
Frequently Asked Questions
What is a normal fasting blood sugar level?
A normal fasting blood sugar level is generally between 70 and 99 mg/dL.
What blood sugar level indicates diabetes?
A fasting blood sugar level of 126 mg/dL or higher on two separate tests may indicate diabetes.
What is a normal A1C level?
An A1C below 5.7% is considered normal.
How often should adults check their blood sugar?
Adults with risk factors should discuss diabetes screening with their primary care provider. Many adults benefit from screening during annual physical exams.
Can prediabetes be reversed?
Many people can lower their risk of developing Type 2 diabetes through lifestyle changes, weight management, regular exercise, and ongoing primary care follow-up.
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