Doctor insights on:
Fasting Blood Sugar 138
My fasting blood sugar shows 138 and after food blood sugar shows 208. Doctor, could you please confirm if I am diabetic?
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
Fasting blood sugar was 83 then I had a bagel an half an hour after it went up to 138 then half an hour after went back down to 112 already normal?
Not necessarily: Your glu after a meal varies with what you ate, how fast, the speed of your GI tract, etc. It is hard to precisely say whether your post meal glu are too high. If you are testing your sugars because you have diabetes, or are worried about diabetes, best to check fasting and pre-meal, and follow your a1c. Normal fasting glu is 100 or less. Diabetes is 126 or more. "impaired" is in between. ...Read more
Evaluate: It's not normal and I would certainly look into it to make sure you are not truly prediabetic. This is an important time point and what you do right now could influence your future. ...Read more
Hypoglycemic agent is indicated but only after you have received dietary/exercise instructions and those conservative methods fail. There is no safe way to reduce this level "quickly"!!!!! You may, in fact, require medication and your Health care Professional will know what to prescribe in your case!
Hope this helps!
Dr Z ...Read more
Fasting blood sugar:
Please go as early in the morning as possible. Once blood is drawn you can relax and eat breakfast. ...Read more
Borderline A1C: A1c is a rough estimate of your last 2-3 months of blood sugars. Your level roughly correlates to an average sugar of 140. Based on this level you are not quite a "diabetic". However, your fasting number qualifies you. It should be repeated but you should begin making lifestyle changes regardless. ...Read more
Minor difference: There is about a 15% difference between whole blood glucose and plasma glucose, with the plasma glucose being higher. If you use a fingerstick glucose monitor, it is measuring whole blood glucose, whereas when you have blood drawn and sent to the lab, it is measuring plasma glucose. Some fingerstick meters will correct for the difference by adding 15% automatically. ...Read more
Probably OK: The normal range for fasting blood sugar is anything from 70 to 99. From 100 to 125 indicates prediabetes. A value of 98 is at the high end of normal. However, blood sugar can fluctuate a lot due to biological and measurement variability. Rechecking fasting sugar a couple times is important. If it remains near 100 then a low glycemic index diet and aerobic exercise should help reduce it. ...Read more
Yes: You should not eat for 12 hours before a fasting test is done. You can have some water if thirsty. ...Read more
Why is my fasting blood sugar so high in the morning even though I ate low carbb the night before?
High AM glucose: The dawn rise of glucose (g) is part of the body's "getting ready for the day. It does this by secreting more cortisol and growth hormone. The liver also releases g "getting ready for the day, raising g. People on on Insulin (i) can time its dose to peak closer to the morning hours. Those not on I can take metformin to lower the levels of g secreted by liver. These actions can reduce your high g. ...Read more
What are normal variations in fasting blood sugar? My normal is around 85, recent test showed 98. 30yo m
See answer: Fluctuations in blood sugar are quite normal and the rule rather than the exception. Blood sugar values will vary depending on the nutritional content of your diet, the amount of time that has elapsed since your last meal, your level of exercise and activity as well as being potentially influenced by medications and illness and other intangible factors. Your fluctuations are well within normal. ...Read more
My fasting blood sugar changed within one month. In January it showed 79 and in February it was 90. Normal? Does it flactuate, if so what r the reasons?
Both normal: Both of the readings are in the normal range. There are a number of factors that may explain the 11 mg difference, e.g. the second specimen was analyzed more quickly after collection, your fasting state was not equivalent for the two tests, there is an accepted 6 mg variation between two tests done on the same sample. If the two tests were done in different labs, that would add to the variability. ...Read more
Not much different: The FBS is not the same every day. It varies day to day so do not worry. ...Read more
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