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Doctor insights on: 12 Hour Fasting Blood Sugar Levels

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How many hours to fast before a fasting blood sugar level test?

How many hours to fast before a fasting blood sugar level test?

Fasting: Depends on what's being measured but nothing after midnight for 8 am lab draw is adequate. Make sure you drink plenty of water. ...Read more

Blood Sugar (Definition)

The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or animal. The body naturally tightly regulates blood glucose levels as a part of metabolic homeostasis. Glucose is the primary source of energy for the body's cells, and blood lipids (in the form of fats and oils) are primarily ...Read more


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Fasting blood sugar level almost the same as after 2 hours. What does this mean?

Fasting blood sugar level almost the same as after 2 hours. What does this mean?

Good beta cells?: If I understand the question, you're fasting glucose is the same as the glucose 2 hr after eating, or after a glucose load? And both glucose levels are normal? During a glucose tolerance test, or a meal tolerance test, it is common for the glucose to stay fairly flat, i.e. Not go up much. It means your Insulin response is very robust. That is good. ...Read more

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Is 11 hours fasting fine for fasting blood sugar level test or is too much and will give inaccurate reading or lesser reading?

Is 11 hours fasting fine for fasting blood sugar level test or is too much and will give inaccurate reading or lesser reading?

Sounds fine: A variety of blood tests gives more accurate results if the patient has not eating food, drank beverages other than water, or taken certain medications that might influence test results. For checking fasting blood sugars, a patient can fast overnight (about 10 hours, but 8-12 hours should be fine) and then give his blood sample before taking his morning vitamins or medications. ...Read more

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Is 5.8 a high fasting blood sugar level? And how come after I eat, an hour later it's 4.0 and I feel a little off/ shakey? Is this normal?

Slightly high: Hi. Yes, you're fasting blood sugar is slightly high, but for diagnostics, you can't use finger stick glucose, you use serum glucose (drawn from a vein in your arm). Are you overweight/obese? If fasting serum glucose is 5.8 (or reproducibly above 5.5), you have prediabetes. You may be briskly secreting insulin in response to food intake, giving you your symptoms. Eat healthily and exercise regularly ...Read more

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My fasting blood sugar level is 106 after 9 hours of my last meal I had at night. Is this high? If it is high what diet should I take to control it?

My fasting blood sugar level is 106 after 9 hours of my last meal I had at night. Is this high? If it is high what diet should I take to control it?

High fasting glucose: Hi. Yes, that would be a high fasting glucose (upper limit of normal is 99). It should be repeated; if reproducible, you have impaired fasting glucose/prediabetes. Use serum glucose, not finger stick, for diagnosis. Healthy diet: whole grains, legumes, nuts, canola/olive oil, fruits & veggies, lean meat, nonfat dairy; minimize fast food, processed food, saturated fat, white flour, white rice, etc. ...Read more

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What to do if I check my fasting blood sugar level was 114 and 2 hours after meal was 169, am i diabetic?

What to do if I check my fasting blood sugar level was 114 and 2 hours after meal was 169, am i diabetic?

Not necessarily: But your glucose are above normal, suggesting diabetes or at least prediabetes. The exact name doesn't matter. You need education, diet, exercise, weight reduction and probably medication. Check w/your doctor. ...Read more

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What is a normal non fasting blood sugar levels?

What is a normal non fasting blood sugar levels?

High blood sugar: In most cases a blood sugar is high if greater than 200 mg/dl. A fasting blood sugar should be less than 126 mg/dl. ...Read more

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Anybody know how to get your fasting blood sugar levels down without going on insulin?

Anybody know how to get your fasting blood sugar levels down without going on insulin?

Lifestyle, oral meds: Lifestyle measures including aerobic exercises 2-3 hours/week, weight loss 5-7% of current body weight, and controlling carbs intake in diet (amount depends on your body) can have significant impact to lower blood sugar levels. If these meaures are inadequate, there are many types of pills that can help: metformin, tzds, secretagogues, dpp-4 inhibitors, bile acid resins, bromocripine, and others. ...Read more

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Is having high fasting blood sugar levels but low hba1c good or bad?

Is having high fasting blood sugar levels but low hba1c good or bad?

Bad: High fasting blood sugars is bad and usually associated with high hba1c levels.
But very low levels may be harmful (say less than 6). ...Read more

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What is a normal fasting blood sugar level?

What is a normal fasting blood sugar level?

If fasting overnight: And drawn out of a vein by a lab, it's less than 100. Check diabetes. Org. ...Read more

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How do I lower my fasting blood sugar level?

How do I lower my fasting blood sugar level?

Wt loss & exercise: How much do you weigh? What is your fasting glucose? Losing weight, at least 10% of existing weight (unless you are underweight), and exercising vigorously at least 30 minutes a day, may reduce fasting blood sugar, or at a minimum keep it from going up. You must consult your doctor before you embark on wt loss and vigorous exercise. ...Read more

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What is normal fasting blood sugar level fbs?

Normal FBS: Between 65-99 mg/dl — impaired fasting glucose (ifg), prediabetes, is between 100-125 mg/ dl. Fbs of 126 mg/dl or higher is in the diabetic range. ...Read more

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What is the normal fasting blood sugar level at 65?

Same as in younger : Normal fasting blood sugar for kids and adults is between 65-99 mg/dl. Young infants are not included in this category. ...Read more

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My fasting blood sugar level is 65 mg/dl? Is it okay?

Be happy: You have normal glucose metabolism. Besides, it was a finger stick they are not totally accurate and generally read low. In any event, 65 is normal fasting even by a lab. ...Read more

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Is it possible for one to fake a high fasting blood sugar level?

Is it possible for one to fake a high fasting blood sugar level?

With fingersticks: If the hands and fingers aren't clean and dry, home blood sugar readings may be inaccurate. Sugar on the fingers could end up falsely elevating blood sugar. A concomitant venous sample in lab could demonstrate a discrepancy. Also, the meter may be inaccurate. Eating before a fasting blood sugar may raise the blood sugar in someone with diabetes because it would not be fasting anymore. ...Read more

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My fasting blood sugar level is 115 to 120 and my age is 49 years. How to control without medicines.

Lifestyle: Weight loss and exercise. 10 lbs of weight loss is more powerful than any medication. ...Read more

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Is having a fasting blood sugar level of 106 high? (I had two cups of black coffee before the test)

Is having a fasting blood sugar level of 106 high? (I had two cups of black coffee before the test)

Need to retest: Fasting blood sugar test should be done after an overnight fast of at least 8 hours. Do not eat or drink anything other than water. 106 is not too high but by some it may be considered pre-diabetic.
For good health — Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex. ...Read more

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Fasting blood sugar level was 110. Typically, in mid 90s. Was nervous/anxious just prior to test. Could this cause a spike? At home, I'm always ~82.

Fasting blood sugar level was 110.  Typically, in mid 90s.  Was nervous/anxious just prior to test.  Could this cause a spike?  At home, I'm always ~82.

Calibration?: Cortisol has been associated with stress & blood sugar; however, the variations are relatively small & can fluctuate throughout the day. Similar to blood pressure readings, which may rise in the doctors office due to stress, a blood sugar reading in the office should be checked more than once, & taken in context, when deciding to treat it. A hemoglobin A1C can show 3 month average blood sugar. ...Read more

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Can Fasting Blood Sugar (FBS) be used for short-term monitoring of blood sugar level?

FBS: I presume you have type 1 diabetes given your age. My apologies if your doctor has said you have type 2 diabetes and he is correct. Very unlikely unless you are substantially overweight.
You should check your blood sugar almost all day if you have type 1 diabetes. There is excellent safe equipment for continuous blood sugar control.
Can you please give me some more information about your diabetes. ...Read more

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Hba1c level is normal but still fasting blood sugar level is 7.2! What does this mean?

Hba1c level is normal but still fasting blood sugar level is 7.2! What does this mean?

Random result: Your HbgA1C result reflects 3 months of blood sugars and a normal value is awesome. This makes the random fasting blood sugar of 7.2 less worrisome. So overall your glucose control is excellent. ...Read more

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Fasting blood sugar level is 6.3. The 3-month average test is normal. Does this mean I am pre diabetic?

Fasting blood sugar level is 6.3. The 3-month average test is normal. Does this mean I am pre diabetic?

Impaired: This is called "impaired fasting glucose", and statistically you have a higher than average chance of getting diabetes, hence the term "pre-diabetes". But now is the time to do something about it: weight loss, exercise, healthy living. You can reverse this. ...Read more

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My daughter who is 13 has a fasting blood sugar level at 5.9 (106)? And after breakfast 8.7 is this ok?

My daughter who is 13 has a fasting blood sugar level at 5.9 (106)? And after breakfast 8.7 is this ok?

More data: Need to know more about her medical history, but that is a big jump, are those Hgb A1c numbers. Discuss with you doctor, get more information through the day to make a decision on whats going on, may need an Endocrinologist ...Read more

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What to do if I'm feeling very thirsty and I have checked my fasting blood sugar level which is 98 mg/dl, is it normal?

What to do if I'm feeling very thirsty and I have checked my fasting blood sugar level which is 98 mg/dl, is it normal?

Probably: Thirst will come with a high sugar because it makes the body sense a high osmolarity and triggers a thirst. High sodium intake can do the dame so your glucose could be normal but if you had high salt food (take out Chinese for eg) you may have a thirst due to the MSG ...Read more

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What to do if I'm feeling very thirsty and I have checked my fasting blood sugar level which is 98 mg/dl, is it normal?

What to do if I'm feeling very thirsty and I have checked my fasting blood sugar level which is 98 mg/dl, is it normal?

Sugar and thrist: You glucose level of 98 mg/dl is normal. Diabetes who have high glucose readings, which causes an osmotic diuresis, that makes them urinate a large amount of urine. That is what makes them thirsty. If you are not urinating excessively, you should not have an elevated glucose. Perhaps you need a greater intake of fluids. ...Read more

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My fasting blood sugar was 151 and then 2 hours after meal it was 149 are these levels ok I'm not diabetic?

My fasting blood sugar was 151 and then 2 hours after meal it was 149 are these levels ok I'm not diabetic?

High fasting.: A fasting blood sugar of that level is indicative of glucose intolerance, the first stage of type II diabetes. But you should discuss this with the doctor who ordered the test. If you got these results on a home machine, you should discuss this and your overall health status with your personal physician. There may be other factors at work. Good luck! ...Read more

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If you have fasting blood sugar labs of 105 and fasting finger tests of 94, what should your glucose levels be 1, 2, & 3 hours after a carb rich meal?

See below: Lab results are more accurate and are used for diagnosis of diabetes. See this site for information on normal glucose in fasting state and levels after a carbohydrate load
http://www.Nlm. Nih. Gov/medlineplus/ency/article/003466. Htm. ...Read more

Dr. Melissa Haglund
153 doctors shared insights

Fasting Blood Sugar (Definition)

Fasting blood sugar is blood level of blood glucose after fasting(not eating) for 8 to 10 hours.Normal range ...Read more