Fasting Vs Nonfasting Blood Sugar
Fasting blood sugar is a test that measures blood sugar and is used to determine if an individual has diabetes. When a person takes this test, they cannot eat or drink for at least eight hours prior to the test. The results determine whether a person is prediabetic or diabetic.
The results are measured in milligrams per deciliter, or mg/dL. The following results indicate whether a person is prediabetic or diabetic:
- Normal: Less than 100 mg/dL
- Prediabetes: 100 mg/dL to 125 mg/dL
- Diabetes: 126 mg/dL or higher
To test nonfasting blood sugar, an A1C test is administered to determine the average blood sugar level of an individual over a period of two to three months. The following results indicate whether a person is prediabetic or diabetic:
Blood sugar levels among people with type 1 diabetes should be:
- Before meals: From 90 to 130 mg/dL for adults
- After meals : Less than 180 mg/dL for adults
- At bedtime: From 90 to 150 mg/dL for adults
Blood sugar levels among people with type 2 diabetes should be:
- Before meals: From 70 to 130 mg/dL for adults
- After meals : Less than 180 mg/dL for adults
- At bedtime: From 90 to 150 mg/dL for adults
Translating Your A1c To A Blood Sugar Level
Using this easy calculator from the ADA, you can translate your most recent A1C result to an eAG or estimate average glucose level.
You can also use this translation when working to improve your A1c and achieve closer to normal blood sugar levels.
If you know an A1c of 6.5 is an average blood sugar level of 126 mg/dL or a range of 100 to 152 mg/dL, then you can look at your current blood sugar results on your CGM and meter and pinpoint which time of day youre frequently higher than this range.12% = 298 mg/dL or range of 240 347 11% = 269 mg/dL or range of 217 31410% = 240 mg/dL or range of 193 2829% = 212 mg/dL or range of 170 2498% = 183 mg/dL or range of 147 2177% = 154 mg/dL or range of 123 1856% = 126 mg/dL or range of 100 1525% = 97 mg/dL or range of 76 120
Normal blood sugar levels in a person without diabetes can result in an A1c as low as 4.6 or 4.7 percent and as high as 5.6 percent.
Just a decade or two ago, it was rare for a person with type 1 diabetes to achieve an A1c result below 6 percent. Thanks to new and improved insulin and better technology like continuous glucose monitors and smarter insulin pumps, more people with diabetes are able to safely achieve A1c levels in the higher 5 percent range.
Why Your A1c Matters
In a nutshell: your A1c is one of the clearest indicators of your risk for developing diabetes complications like neuropathy , retinopathy , nephropathy , and severe infection in any part of your body that requires healing.
For instance, a small cut on your toe could become infected due to high blood sugars, struggle to heal, and become severe enough that the infection could lead to an amputation.
The general guidelines from the American Diabetes Association recommend an A1c at or below 7.0 percent for the best prevention of diabetes complications. Your risk of developing a diabetes complication continues to drop as your A1c drops closer to 6 percent.
Some people with diabetes aim for A1c levels in the 5s and lower especially those who follow strict low-carb diets like the ketogenic diet and the Bernstein diet. However, this hasnt been proven in research as especially necessary, nor is it reasonably achievable for the larger population of people with diabetes.
Its also important to remember that your blood sugar levels and your A1c are just information that tells you whether your body needs more or less of factors like insulin, other diabetes medications like Metformin, changes in your nutrition, and changes in your exercise.
If you dont like the number youre seeing on your glucose meter or your A1c results, use that number as motivation to make changes in how you safely manage your diabetes in order to get different results.
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How Can I Tell If My Blood Sugar Is Irregular
Again, only a doctor can diagnose a problem with your blood sugar. But you may be wondering how to know if it’s something you should get checked out. There can be two main issues with your blood sugar — either it’s consistently too high or too low. Even if you don’t have diabetes, there are some signs that your blood sugar levels are not functioning normally.
Hypoglycemia is a condition in which your blood sugar is too low. Signs include an irregular heartbeat, fatigue, shakiness and tingling or numbness in your face. If you consistently feel this way when you get hungry or between meals, talk to your healthcare provider.
On the flipside, hyperglycemia happens when your blood sugar is too high, and can happen to nondiabetics. Symptoms include frequent urination, increased thirst and headache. If you think you’re hyperglycemic and can’t keep fluids or food down, call for emergency medical assistance.
Blood Sugar Levels During Pregnancy
The NIDDK states that gestational diabetes is high blood sugar that occurs during pregnancy if you were not diabetic before getting pregnant. Healthy blood sugar during pregnancy can help lower your risk of developing type 2 diabetes later. It can also lower the risk of your baby being born prematurely, at a high birth weight, and having respiratory problems.
Blood sugar and insulin levels during the first trimester of pregnancy tend to be lower than usual, but they rise during the late second and early third trimesters. You can be diagnosed with an oral glucose tolerance test .
These are the steps for the 2-step strategy.
- Drink a solution with 50 grams of glucose about the amount in 1 16-oz. bottle of a soft drink
- Get your blood drawn after 1 hour. Ig the value is high, retest
- Drink a solution with 100 grams of glucose about the amount in 12 peanut butter cups
- Get your blood drawn immediately and after 1, 2, and 3 hours
Or, your doctor might use the 1-step strategy with a 2-hour OGTT:
- Drink a solution with 75 grams of glucose
- Get your blood drawn immediately and after 1 and 2 hours
These are some values to know from NIDKK related to gestational diabetes and healthy blood sugar in pregnancy.
Blood sugar can vary greatly depending on when you take it. For example, after 1 hour, a reading of at least 180mg/dl can indicate signs of gestational diabetes, while a blood sugar reading after 3 hours would need to be 140 mg/dl would be cause for concern.
Read Also: What Is A1c For 150 Blood Sugar
How Do I Measure Blood Sugar
If you have diabetes, you probably already keep a watchful eye on your blood sugar through the use of a continuous glucose monitor or a blood sugar meter . Blood sugar measurement is also typically included in routine lab work for people without diabetes — your physician will usually order a glycated hemoglobin test, which measures your average blood sugar over the past two to three months.
Say your A1C test comes back with no sign of diabetes — constantly measuring your blood sugar can still be helpful. For instance, some people experiment with using a CGM to see how their body responds to different types of food. However, it’s good to note that this is a fairly cost-intensive way of figuring out your nutrition, and writing down a food diary that includes how you felt after each meal will also help you figure out what to eat.
Check out these blood sugar monitors if you’re looking for recommendations on how to keep track of your levels at home.
Do I Need To Check If My Blood Sugar Level Is Normal
If you have type 1 or type 2 diabetes, tracking your blood sugar regularly will help you understand how medication, food, and physical activity affect it. Checking your blood glucose level also gives you the chance to see when it’s rising and take action to correct it.
Others who may want to track their blood glucose regularly include people:
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What Is A Normal Blood Sugar Level
I was diagnosed as a pre diabetic so my question is, is 112 a normal blood sugar level? Im new to this. The American Diabetes Association currently classifies anyone with fasting blood sugar between 100-126 mg/DL as having Pre-diabetes. Anything over 126 mg/DL is classified as being diabetic. What is normal keeps changing. There was a time, barely a decade ago, when having fasting blood sugars of 150mg/DL were classified as being normal. From a simple, practical standpoint, heres what research shows and what you may want to do, to prevent becoming diabetic. Nothing happens overnight. Its not like your blood sugar is perfect and then suddenly, one morning, you wake up with pre-diabetes. New research shows that diabetes causes gradual damage to internal organs, including your arteries, even at fasting blood sugar levels between 80-100 mg/DL. So the sooner you can improve your diet and lifestyle, the faster you can prevent this damage. This way, you can also save yourself from being classified a full blown diabetic down the road. The resources we shared earlier, in terms of how doctors are Reversing Type 2 Diabetes were to help you achieve this. The way to prevent/reverse Pre-diabetes is the same as the way to prevent/reverse Diabetes. Clean up your diet and lifestyle with small steps and your body will thank you and serve you well for decades.Continue reading > >
Different Levels And What They Mean
The ranges of safe levels of blood glucose depend on factors such as what time of day it is and when you last ate. Safe levels of blood sugar are high enough to supply your organs with the sugar they need, but low enough to prevent symptoms of hyperglycemia or complications of diabetes which follow the National Institute of Diabetes and Digestive and Kidney Diseases guides. Dangerous levels of blood glucose are outside of this range.
The target levels can also vary if you have diabetes. For example, if you are diabetic and are monitoring your blood sugar, you might get a reading of 65 mg/dl. That is considered to be mild hypoglycemia, and you would be wise to eat 15 grams of fast-acting carbohydrates and retest your blood sugar in 15 minutes.
If you were not diabetic, you probably would not know that your sugar was low because you would not test and because you would not symptoms, and you would not act.
That is fine because your body is capable, under normal circumstances, of raising your blood glucose to healthy levels when needed, even if you have not eaten. It is important to keep them in control to help prevent issues like heart disease or nerve damage.
Looking for the best prediabetes diet? Learn what foods are best to help you manage your prediabetes.
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Still Frustrated With Your Blood Sugar And A1c Results
Your blood sugars and your insulin or medication needs never stay in one place. If you gain weight or lose weight, your insulin and medication needs will change. If you become more active or less active, your needs will change. If you make drastic or even small changes to your nutrition, your needs will change!
Working with your diabetes healthcare team, and diabetes coaches who can teach you how to make changes in your overall diabetes management plan are essential. Diabetes is a lifelong learning process.
Take a deep breath and be patient. If you dont like what youre seeing on your glucose meter, dont get madget studying! Take good notes and work with your team to make changes to reach your goals.
How Does Food Affect My Blood Sugar
When you eat, your body breaks food down into carbohydrates, proteins, fats, vitamins, and minerals.
You need all of these parts for a healthy diet, but carbohydrates are really important when it comes to your blood glucose level. However, not all carbs change into blood sugar at the same rate.
Examples of foods that fit into each carb category include:
- Starches, or complex carbohydrates: Starchy vegetables, dried beans, and grains
- Sugars: Fruits, baked goods, beverages, and processed food items like cereals
- Fiber: Whole wheat products, chickpeas, lentils, berries, pears, and Brussels sprouts
The glycemic index is a carb ranking system that uses a scale ranging from zero to 100. You can use the GI to find out how different foods affect your blood sugar levels.
High GI foods are quickly processed and can cause a rapid spike in blood sugar levels. Low index foods are more slowly processed which leads to smaller blood glucose level changes.
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Why Doctors Order It
A fasting blood glucose test is done to screen for prediabetes and diabetes. It also helps doctors monitor diabetes and determine if medications and dietary changes are having an effect .
Your fasting blood glucose level is the lowest your blood sugar can be because the influence of recent meals is minimized .
Fasting blood sugar is often checked alongside HbA1c , which is a measure of your blood sugar levels over the past three months. The more sugar there is in the blood, the more it will attach to hemoglobin, raising HbA1c .
Taken together, the two offer more information than each test alone. For example, even if your blood sugar levels are very high at one random point, they may have been mostly low over the past couple of months . On the other hand, HBA1c could be higher but your glucose levels at the moment lower.
Apart from diabetes, abnormal levels can point out issues such as insulin resistance, hormonal imbalances, and pancreatic, liver, or kidney disease.
Normal Blood Sugar Ranges In Healthy Non
For a person without any type of diabetes, blood sugar levels are generally between 70 to 130 mg/dL depending on the time of day and the last time they ate a meal.
Newer theories about non-diabetic blood sugar levels have included post-meal blood sugar levels as high as 140 mg/dL.
Here are the normal blood sugar ranges for a person without diabetes according to the American Diabetes Association:
- Fasting blood sugar : Less than 100 mg/dL
- 1-2 hours after a meal: Less than 140 mg/dL
- 2-3 hours after eating: Less than 100 mg/dL
Also Check: What Sugar Level Is Considered Diabetic
What Are Normal Blood Sugar Levels After Eating
If you want to get an idea of what your normal blood sugar levels are, you’ll need to check them. Your provider might want you to check at different times of the day, but you can start by checking your blood glucose levels one to two hours after eating.
Seeing what your blood sugar is after a meal or snack can help you better understand how your levels are affected by the food you eat as well as when you eat.
If you have diabetes, checking your blood sugar regularly helps you figure out if you’re taking the right dose of insulin .
As a general rule, your blood sugar level should be below 180 mg/dL one to two hours after you start eating a meal or snack.
However, your target blood sugar range will depend on:
What Factors Affect Blood Sugar
You can guess that carbohydrate intake and insulin production are at least partly responsible for your blood sugar levels. But the list is much longer — almost every lifestyle choice you make can affect your blood sugar. Here’s just a partial list.
- Exercise can affect insulin sensitivity, leading to lower blood sugar for up to 48 hours.
- Alcohol intake increases insulin production, causing low blood sugar.
- Stress hormones like cortisol can raise blood sugar, because your body wants access to energy in order to escape what it perceives as a dangerous situation.
- Medications, especially statins and diuretics, can raise blood sugar. Statins are used to treat cholesterol, and diuretics for high blood pressure.
- Diet is a major player in blood sugar. Eating too many simple carbs at once can cause levels to skyrocket, while protein intake leads to a slower increase in blood sugar.
- Dehydration raises blood sugar, because with less water in your body the glucose concentration will be higher.
Other surprising factors can affect your blood sugar, like a sunburn or gum disease, so if you’re dealing with a blood sugar issue and can’t figure out what’s causing your spikes and dips, talk to a health care professional.
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Fasting Blood Glucose Level Test Preparation
What should you do if your doctor orders a fasting blood sugar test? The preparation is the same as when you take a fasting test for cholesterol. First, be sure to find out if you need to schedule an appointment for your test . Ask your doctor what time is best to take it.
- Schedule your test if necessary
- Ask your doctor if you need to change any of the medications you take on the morning of the test
- If you normally drink coffee or have caffeine, ask your doctor if that is okay. It may not be, since it affects blood sugar levels
- Fast for at least 8 hours before your test. Usually, an overnight fast is most convenient
- You can drink water