Maximum Blood Sugar for someone without diabetes?

Here's the chart on this site, however I know a few "normal" people will test high because of something they ate. Like pizza late the night before (high fat, high carb) can cause a higher than normal blood sugar the morning after. Or if someone decides to eat a huge smoothie loaded with fruit juices, that can cause an increase higher than normal, but it should be corrected in the normal time in a non diabetic. So there are exceptions sometimes.

.https://www.diabetes.co.uk/diabetes_care/blood-sugar-level-ranges.html

As far as non diabetics are concerned, there is no straight answer to that ...

If I hadn't have got Type 2, for me I would want an FBG around 4.5. To stay under 5.5 after a liver dump and in-between eating. To spike no more than 1.5 mmol at any time after a meal.

According to Dr Bernstein, normalized glucose levels are 83 mg/dL (~4.6 mmol/L). So essentially that's an average glucose levels all the time of 4.6 mmol/L. Non-diabetics shouldn't peak above 7.7 at any time I believe.

11.1 mmol are the highest peak a non-diabetic could have.

Don’t know where people get 5.5 or 7.7 from. In an OGTT blood sugar should be less than 7.8 mmol AFTER two hours. Meaning non diabetics should have blood sugar less than 7.8 mmol 2 hours after last meal of deing. Meaning they would have higher peaks in the meantime, before it has gone 2 hours.

So to answere your question, non diabetics will not get blood sugar above 11.2 mmol. Meaning peaks of 10-11 mmol after eating for non diabetics are completely fine and normal.

Ask a hundred different people and you would probably get a hundred different answers, but here is some thing I found on the net.

"Normal blood sugar varies from person to person, but a normal range for fasting blood sugar (the amount of glucose in your blood six to eight hours after a meal) is between 70 and 100 milligrams per deciliter. For most individuals, the level of glucose in the blood rises after meals. A normal blood-sugar range after eating is between 135 and 140 milligrams per deciliter.."

For UK numbers just divide by 18

https://www.livescience.com/44498-what-is-normal-blood-sugar.html

Emile_the_rat said:

11.1 mmol are the highest peak a non-diabetic could have.

Don’t know where people get 5.5 or 7.7 from. In an OGTT blood sugar should be less than 7.8 mmol AFTER two hours. Meaning non diabetics should have blood sugar less than 7.8 mmol 2 hours after last meal of deing. Meaning they would have higher peaks in the meantime, before it has gone 2 hours.

So to answere your question, non diabetics will not get blood sugar above 11.2 mmol. Meaning peaks of 10-11 mmol after eating for non diabetics are completely fine and normal.

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Where did you get your figures from? 10-11 post meal is not completely fine or normal.

When I was questioning my diagnosis, the doctor said "yes you are definitely diabetic with a number of 26, if a non diabetic ate a whole bag of jam doughnuts they would not go above 11"


edit: long time ago and it was an A&E doc who I don't think was a specialist

Fenn said:

When I was questioning my diagnosis, the doctor said "yes you are definitely diabetic with a number of 26, if a non diabetic ate a whole bag of jam doughnuts they would not go above 11"

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That doesn't mean its correct. They also push high carb, high average a1c's and high average glucose levels. I've not seen any studies that say the majority of healthy individuals have post meal spikes of 11, there will be rare cases where people do, but that's more likely they are border-line diabetic etc.

Muneeb said:

That doesn't mean its correct. They also push high carb, high average a1c's and high average glucose levels. I've not seen any studies that say the majority of healthy individuals have post meal spikes of 11, there will be rare cases where people do, but that's more likely they are border-line diabetic etc.

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No, thats true, I was just quoting what was said to me.

That does however mean we should never trust anything a doctor says and research for ourselves, and I question why when asking for advice on the forum I often see people say "consult your doctor" we cannot give advice re...

Muneeb said:

Where did you get your figures from? 10-11 post meal is not completely fine or normal.

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https://www.diabetes.co.uk/diabetes_care/blood-sugar-level-ranges.html «
Blood sugar levels in diagnosing diabetes, Normal: Random reading - Below 11.1 mmol/l
Below 200 mg/dl»

From diabetes uk: «Methods and criteria for diagnosing diabetes - a random venous plasma glucose concentration ≥ 11.1 mmol/l or» Link: https://www.google.no/amp/s/www.diabetes.org.uk/professionals/position-statements-reports/diagnosis-ongoing-management-monitoring/new_diagnostic_criteria_for_diabetes%3famp

It is well known standard that a random venous plasma of 11.2 or higher WITH symptoms of diabetes qualify as diabetes. This means that all random readings below 11.2 are considered non-diabetic.

I see you have type 1 diabetes, and then you of all should now that 10-11 mmol are not really high, compared to them who have diabetes.

I also never said post meal, I said that the blood sugar could raise to 10-11 mmol after eating, as long as it went down to 7.7 or lower after 2 hours.

If you do not believe me you can ask your GP or diabetes team. 10-11 mmol are normal for non diabetics 30-60 min after eating if they have eaten something with high GI.

Fenn said:

No, thats true, I was just quoting what was said to me.

That does however mean we should never trust anything a doctor says and research for ourselves, and I question why when asking for advice on the forum I often see people say "consult your doctor" we cannot give advice re...

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Fair enough. Its not we don't trust anything but we need to know what the recommendations are based upon, and at the moment they are advising on standards that are just not suitable, and yes they do also want to cover their own backs so tend to err on the side of caution,

Antje77 said:

We're talking absolute maximum here, as per the question in the opening post. Which isn't about normal meals.

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Well the way I saw it was the absolute maximum at any point of the day, meaning a normal day. If a non-diabetic was seeing 11 mmol everyday that should ring alarm bells. If they see it once a month maybe not so.

Emile_the_rat said:

https://www.diabetes.co.uk/diabetes_care/blood-sugar-level-ranges.html «
Blood sugar levels in diagnosing diabetes, Normal: Random reading - Below 11.1 mmol/l
Below 200 mg/dl»

From diabetes uk: «Methods and criteria for diagnosing diabetes - a random venous plasma glucose concentration ≥ 11.1 mmol/l or» Link: https://www.google.no/amp/s/www.diabetes.org.uk/professionals/position-statements-reports/diagnosis-ongoing-management-monitoring/new_diagnostic_criteria_for_diabetes%3famp

It is well known standard that a random venous plasma of 11.2 or higher WITH symptoms of diabetes qualify as diabetes. This means that all random readings below 11.2 are considered non-diabetic.

I see you have type 1 diabetes, and then you of all should now that 10-11 mmol are not really high, compared to them who have diabetes.

I also never said post meal, I said that the blood sugar could raise to 10-11 mmol after eating, as long as it went down to 7.7 or lower after 2 hours.

If you do not believe me you can ask your GP or diabetes team. 10-11 mmol are normal for non diabetics 30-60 min after eating if they have eaten something with high GI.

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Diagnosing somebody at 11.1 doesn't mean that, 11.2 or lower is normal, that's their threshold. If a non-diabetic had a random level of above even 9 I can near enough guarantee they would reassess the person for potential diabetes.

I do have type 1 diabetes, and if my levels spike more than 10 mmol/L at any time, that would make me concerned. I try and stay in range of 4-7 mmol 80% of the time with no peaks greater than 10 after any meal. At 10-11 I feel very groggy, that's almost 3 times the normal glucose levels. Post prandial levels have been shown to have significant impact on a1c levels.

post meal/after eating what's the difference?

Gp's information must be backed up by some evidence or study of some sort, none of which I have seen. I may be wrong, but I've not seen any such evidence.

Muneeb said:

Diagnosing somebody at 11.1 doesn't mean that, 11.2 or lower is normal, that's their threshold. If a non-diabetic had a random level of above even 9 I can near enough guarantee they would reassess the person for potential diabetes.

I do have type 1 diabetes, and if my levels spike more than 10 mmol/L at any time, that would make me concerned. I try and stay in range of 4-7 mmol 80% of the time with no peaks greater than 10 after any meal. At 10-11 I feel very groggy, that's almost 3 times the normal glucose levels. Post prandial levels have been shown to have significant impact on a1c levels.

post meal/after eating what's the difference?

Gp's information must be backed up by some evidence or study of some sort, none of which I have seen. I may be wrong, but I've not seen any such evidence.

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Well everyone are different. I for once do not feel any different if my blood sugar are 10-14 mmor or 6-7 mmol. I have several times checked my blood sugar, thinking it were low or normal and seen numbers up to 14 mmol.

Getting blood sugar over 16 mmol however makes me feel ******, so everyone are different there.

When you say «Gp's information must be backed up by some evidence or study of some sort, none of which I have seen.» I have to ask, have you ever study medicine? Most of the curriculum for this study, and litterature on the subject have a consensus that blood sugar up to 11.1 mmol after something with high GI (glycemic index) are normal even for non diabetics. There is plenty of evidence to back it up if you read the correct litterature or books

Post meal and after eating are very different. Post meal are before eating, and would most likely be much lower in non diabetics if they havn’t eaten in a while. After eating however, are when the blood sugar breaks down the glucose, causing a temporary raise, hitting the peak 30-60 min after eating. And it is this peak I mean can hit 10-11 mmol in non diabetics when ingesting something with high GI.

I thought that maybe this was information all diabtics got from their diabetic nurse or gp at diagnosis. But it might be different practice from different countries.

Also I’ve tested a lot of my friend who are non diabetic, and well blood sugar over 9 mmol are very common if tested at the correct time, after eating or drinking something with much carb.

But if you’re able to keep your blood sugar between 4-7 mmol 80% of the time, I have to say you’re doing a pretty good job. Because that is hard and much work when being a type 1 diabetic And I think that might be the reason for you feeling bad with 10-11 mmol, because you’re used to stay pretty low (I mean low in diabetic terms).

Bottom line, all the litterature I’ve read, and from my GP my understanding were that blood sugar up to 11 are not uncommon for non diabetics. But I mean as a peak, it should of course go down, and be under 7.8 mmol after 2 hours, and less than 6 mmol at the 3 hours mark

Emile_the_rat said:

Post meal and after eating are very different.

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Post meal is the same as after eating - post meaning after.

Really the answer to that is how long is a piece of string. Give a non diabetic as meal full of starchy carbs and a fruit pudding and their BG can rise into double figures and a few here have proved that by testing their non diabetic relatives. Theirs though would probably go down a lot quicker than a diabetics would. Just like us who have diabetes they are all different My levels as a T2 rarely go under 5 whatever I do but I am happy with that where some others some go down to the 3's.