# How much glucose in a gram of carbohydrate?

Here's a puzzle that's bothered me lately:

A gram of glucose should raise your blood glucose by 17 mg/dl:

1,000 mg / 56 deciliters = 17.8 mg/dl

Yet eating a gram of carbohydrate only raises BG by 4 mg/dl

4 mg/dl * 56 deciliters = 0.224 grams

...so one gram of carbohydrate == 0.224 grams of glucose?

Evidently the body consumes at least 150 grams of glucose/day:

about 100 g of glucose/d are irreversibly oxidized by the brain from the age of 3–4 y onward. However, this excludes recycled carbon, gluconeogenic carbon, for example from glycerol, and it does not account for glucose used by other non-CNS tissues. For example, in the adult, muscle and other non-CNS account for an additional 20–30 g of glucose daily. For this reason a safety margin of 50 g/d is arbitrarily added to the value of 100 g/d

...so, in order to supply the 150 grams of glucose, I need to consume at least 600 grams of carbohydrate per day?

At a maximum rate of 60 grams of carbohydrate/hour, looks like I'd better get busy...

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### Replies to This Discussion

Not all carbohydrates are glucose though, there's lactose, fructose, Budweiser, etc.? I think they all have sort of different "curves" that play out. This is a totally unscientific hunch but well, you know?
Well, crap, Bud is a carb?
Bud Select 55 is only 1.9G, "the lightest beer in the world" *cheers*
Huh?I'm not a scientist and have no idea what any of that means, but see a couple problems in it from a D point of view. First of all, we are all different in how much carbs raise our blood sugar. There is no formula that holds true for all of us. Second of all, I hope you are kidding, but if not, please reconsider whatever convoluted science is convincing you that you should eat 600 grams of carbs per day!
On the average 1 gram of carbohydrate usually raises the blood sugar 3-5 mg/dl. It varies by body weight, or probably more correctly, by the total amount of blood. I've never heard of anyone claiming a 17 mg/dl rise from eating 1 gram of CHO.

I'm guessing that 25% of the carbs you eat are broken down into glucose (what happens to the other 75%?)... so how else do you get 150 grams of glucose?

Something doesn't add up here... and that's what's got me puzzled.
1 gram of carb raises me over 10mg/dl...& I'm not a tiny person...5'6" & 150-155lbs (68.31kg - 70.31kg)...am I really that weird? =[
How FUNNY!
Attachments:
If you're "How FUNNY!" comment relates to my statement that you can't determine exactly how much of a rise in blood sugar each person gets from a formula, you could probably find a less rude way to disagree with me. I have no idea what the source of your table is, but I stand by my opinion based on my own experience and that of many others on here. Some people seem much more "carb sensitive" and have large rise in BG with a relatively minor intake of carbs. Other people can eat large amounts of carbs without a significant spike. It also seems to vary by type of carb. For example, for many of us (but not all, of course), rice will raise our blood sugar an inexplicably large amount and this despite what would be a reasonable bolus for the same number of "other" carbs. All carbs are definitely not equal

Like everything with Diabetes, formulas and rules are good for guidelines but have almost as many exceptions to the rule as there are Diabetics!
It would be indented if it was a reply to your post. It looks to me like the How Funny comment was in regards to the notion that diabetics are supposed to consume 600 carbs a day. Which is kind of funny. I'm pretty sure the OP was being sarcastic that we need to eat that many carbs as well.
Perhaps you are right, and I am being too sensitive Jeska! I just made that assumption because a table of carb rise was included.
A table that I don't fit lol

And I hope I'm right that it wasn't directed toward you :o)
Fats and proteins also get converted to glucose in the body, granted in a smaller percentage than carbohydrates. So it's not just all about carbohydrates....

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