Glycemic response to beer

The glycemic response to beer can be worrying if you are prediabetic. Any carbohydrate that is rapidly absorbed causing a spike in blood glucose draws a corresponding spurt of insulin; high sugar levels damage the arterial lining.

Repeated many times a day and eventually insulin resistance sets in; sugars are not absorbed into the cells demanding an even greater amount of the hormone; it's a recipe for disaster.

Since I am myself possibly prediabetic, there are obviously concerns whether beer, and other foods, could be contributing to my early demise. Whilst not wanting to be alarmist, life is good, and I have no desire to have a heart attack or stroke long before my time.

It probably seems macabre, but mutilating your fingers and testing your own blood is both inexpensive, and extremely interesting. More than 50% of diabetics are walking the street not knowing they have a very serious disease that is going to cut their lives short, and make the end miserable and very painful; it's a sobering thought.

And so I have tackled the subject of the glycemic response to beer, and other starches that I consume. It's a complex subject; I won't pretend otherwise, but it has the potential to add ten good years to my life, and yours too. I think it's eminently worth the pricks my fingers are being subjected too.

I'm a blood donor; yesterday's jab by the vampire was far more intimidating but one does it for altruistic reasons.

Glycemic response to beer

The glycemic response to beer occurs because of the alcohol and malt sugar, both of which are carbohydrate which is digested in the small intestine, raising blood glucose.

It is in principle no different to a candy bar, or can of coke. Surprisingly diet sodas are even more likely to cause you to become insulin resistant and diabetic; if you value you health, avoid artificial sweeteners.

So, we all know that alcohol certainly affects our brains; some it makes violent, and others it simply puts to sleep. It dulls the senses and makes us dangerous, to both ourselves and others, if we get behind the wheel of a car.

But we love it, and will no doubt continue to enjoy our beer and wine.

But in the context of insulin resistance, stroke and cardiovascular disease, but does our favourite tipple do our blood sugar. Do we get a massive spike, and what's it like after two hours? I set out to find some answers. You of course will most likely react very differently, given the context of your lifestyle and the food you eat. I recommend you test yourself. It's not difficult.

I decided to test my glycemic response to beer exactly in the way that I normally enjoy; a quart before dinner at night. I could have cheated and first had a glass and then the first course, and then another, and so on, but that would have changed the result drastically.

No cheating!

Plus in the evening, unlike during the day when I go out and keep physically busy after a starch of which I'm suspicious, at night I'm a couch potato; I sit down at the computer and write boring pages like this. You test yourself exactly in the way you enjoy your beer.

What do you need? A glucometer, a stabbing stick and a little card that is inserted into the device. four pricks of the fingers and in two hours you'll know exactly where you stand regarding the glycemic index of beer, or wine for that matter.

Time (mins) Glucose (mmol/L) (mg/dl) Food

0                                4.3           78      Water + 2 gl beer

30                              5.2           94      1 gl beer

60                              6.5           116     Dinner

120                            5.6           101

Beer: 1 quart or 730ml, 26 g carbohydrate

Dinner: Fresh lima and broad beans, broccoli, one egg, 1 slice 100% wholemeal bread and butter. 15g + 5g + 0g + 15g = 35g

Total carbohydrate for the meal: 61g

If you are diabetic, this amount of starch at one sitting, with no exercise, would be disastrous; those glucose readings would be quite different. We cheat, thinking we are clever, by using a little extra of the hormone, but it just hastens the day of that stroke or heart attack, or loss of half your foot. We become more and more insulin resistant.

Simply going without that beer would halve the glycemic load; luckily I am not diabetic and I can continue to kid myself that it's not doing me any harm!

If I had succumbed to icecream and hot chocolate sauce after dinner, then I would be a gonna; one cup could easily add nearly 50g more carbohydrate. In fact, when my fingers have recovered, I'll have exactly the same meal, testing for the glycemic response to beer, but add a cup of my favourite dessert; that reading after two hours will be quite different I suspect, and I should add a third after three hours.

This is really just about taking responsibility for our own health, and finding out what carbs spike our blood glucose. Orange juice is my Achilles heel, and I love it, so small amounts, much diluted, and a walk after breakfast.

There will be photographs to follow.

Oh, and what does that homemade braggart do to my blood sugar? Beer made with honey instead of sugar.

  1. Bernard Preston
  2. Meaning of starch
  3. Glycemic response to beer



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