How to test for prediabetes

How to test for prediabetes is supremely important since recent guidelines indicate that one out of two Americans have significantly raised blood-glucose; and that probably applies to most first-world countries.

It is the leading cause of kidney disease and adult-onset blindness. That is not "small beer."

Added to that the increased risk of heart-disease and stroke makes diabetes the seventh leading cause of death.

How to test for prediabetes at home may help those who have great anxiety about consulting doctors; a sharp retort about your weight may just be too painful to contemplate. Ironically it's all because of medical researcher, Radley Keys, who crooked the books, that we have been led down the garden path and programmed for raised blood glucose and insulin-resistance.

Using the current guidelines, which many argue should be far tighter, at least 48% of Americans have significantly raised blood-glucose.

  • 13% of adults have frank diabetes.
  • 35% have prediabetes.

Given that only one in seven know that they are seriously at risk, how to test for prediabetes at home is certainly relevant.

How to test for prediabetes

How to test for prediabetes can be achieved in three different ways. Two of them can easily be done at home if you know someone who has a glucometer; many folk have the device.

Here are the guidelines for diagnosing prediabetes.

  1. A fasting blood glucose level above 100 mg/dL (5.55 mmol/L).
  2. A 2 hour post-glucose load giving a reading above 140 mg/dL (7.77 mmol/L).
  3. HbA1c above 5.7%.

The frank-diabetes levels are obviously higher.

  1. A FBG level above 125 mg/dL (7.0 mmol/L)
  2. A 2-hour level above 200 mg/dL (11.1 mmol/L)
  3. HbA1c above 6.5%.

Fasting blood glucose

The fasting blood glucose is the easiest way to test for prediabetes. One prick first thing in the morning before eating or drinking will do the trick. However it is probably also the least reliable; other tests may confirm a false negative.

Glucose tolerance test

In the medical setting the glucose load for the 2-hour test is 75 grams, about 15 tsp of sugar, for a precise reading. It's done first thing in the morning in the fasting state.

Should you object to so much sugar, you could drink 750 ml of freshly-squeezed OJ; about 6 oranges. Then without exercising and nothing else to eat, you would prick your finger two hours later and test your blood glucose.

Ideally you should drink all that juice immediately after the fasting blood-glucose test on awakening in the morning; two hours later prick your finger.

How to test for prediabetes can be done at home, but obviously this would just be an approximate reading. It would be a good guide; if the result is high then you should obviously go for a full medical evaluation.


The HbA1c test is the most reliable since it gives a measure of blood glucose averaged over the life of a red-blood corpuscle; about two months. It is unaffected by what you've recently consumed, nor whether you have been ill or not. It has to been done by a path lab, and could be ordered without consulting your doctor.

A reading above 5.6% is of concern. Keto-physicians would argue that it should really be below 5.5pc.


There is considerable disagreement amongst physicians whether those who are prediabetic should eschew all carbs, or just refined starches. There are persuasive arguments on both sides of the divide.

The issue is how quickly, and to what degree the starches we consume are converted into blood glucose. The pro-unrefined carbs group argue that there is massive evidence that whole-grains and the pumpkin family, for example, provide much needed fibre and the phytonutrients that prediabetics need to manage their disease.

By keeping portions small they can be assured of an overall low glycemic-load.

And, yes, admit it plainly that prediabetes is already a diseased state and it affects almost a half of the adult American population.

The all-carb group of physicians from the keto lobby would say that it is impossible for those with a BMI over 30 to lose a significant amount of weight without severely limiting all starches; certainly below 50g per day and even less for those who are morbidly obese.

Weight-loss research confirms that the obese cannot lose weight by exercise alone; the body compensates so that only half of the energy expended in walking, for example, actually contributes to a meaningful drop on the bathroom scale.

Both groups are correct

Billy Tosh lost a huge amount of weight by banting.

Both groups are correct, of course. Whole grains and low GI starches like butternut certainly contribute to more stable blood glucose and greater wellness. The pumpkin family has actually been used for centuries in the treatment of diabetes; in small portions to keep the glycemic-load down.

And the keto-groups are also correct; we can only lose pounds by strictly limiting all carbs, even the good ones, for a period if we are morbidly obese. They would also say that true "whole grains" are extremely difficult to get in any case. Other than corn on the cob, brown rice and bulgar they are few and far between.

About the only exception are those who bake their own artisan bread[2] using 100 percent real flour.

How to test for prediabetes has value as it affects half the people in the USA and in much of the rest of the world; it is a pandemic all on its own.

It weaves its own mystery around the virus with diabetics falling left and right.

Can we trust governments?

Comparing the performance of health care systems in high-income countries, the US comes stone last by a large margin[3]. And according to Bloomberg index only 37th in the world, and this despite, as a percentage of GDP, spending about 70% more.

And South Africa features only on the lists of the most unhealthy countries; in the bottom ten.

When it comes to universal and affordable care, the Netherlands is the best performer, again with the US stone last.

What this means is that each of us needs to take more responsibility for our own wellness; there are so many factors that government cannot and will not do. Each of us needs to treat Brother Ass kindly, or he will certainly turn around and bite us, to use the allegory of St Francis of Assisi. Sister Jenny can be just as vicious when mishandled.

We all should know how to test for prediabetes; and be willing to deal with the issues raised if we want to live long in the land.

What can I do for myself?

What can I do for myself is a question we should all be asking ourselves. After all we are the ones who will experience the sheer misery of poor health; worse than pain is the disability. We simply are unable to do the things we want to do; strong and zestful eighties and nineties moves completely off the radar.

These are the factors we rank highly. Follow them and you will not have to know how to test for prediabetes.

1. TAke a walk regularly

Those who take a walk regularly have a massive lower all-cause of death. Yes, an hour would be better than ten minutes, but try and do something; every single day.

2. Eat many coloured foods

Coloured foods contain the unnumbered phytochemicals, far too many to count, that are so important for wellness. You simply cannot get them all, or even a fraction, from supplements. And in particular in regard to prediabetes, make sure that small amounts of the pumpkin family find their way on to the plate regularly; without sugar. Prediabetes is scary.

To get sulforaphane for diabetics you have to be eating your greens daily.

3. Enjoy more whole foods

Whole foods are becoming increasingly difficult to obtain, and it takes some effort.

Convenience foods are our downfall; once in the groove baking your own pizza with a whole-grain base really is not difficult; but you do have to plan ahead if you want to make it with a sourdough base.

Why is whole grain better? Corn on the cob should be on the plate regularly all summer.

Sourdough pizza crust.

4. Make your own probiotic

How to make kefir is so easy; really it takes so little effort, perhaps five-minutes twice a week. Keeping a healthy microbiome in the gut is absolutely fundamental to our wellness; you simply cannot get the broad spectrum of bugs from a supplement.

The gut is now being called the second-brain. This is where the neurodegenerative diseases like Alzheimer's and Parkinsons begin.

Kefir in a funnel; in a colander actually.

5. Bake your own sourdough bread

In all five Blue Zone countries[4] they bake and eat only sourdough bread; the taste is divine and in particular if you use 100-percent real flour you get the lignans that prevent breast tumours, and the vitamin E that is a natural coagulant.

All the fibre means you will not have to know how to test for prediabetes and you are unlikely to suffer from a colorectal tumour; a bowel movement becomes a daily two-minute affair.

"Lignans are bioactive, non-nutrient, without calories phenolic plant compounds that are found in highest concentration in flax and sesame seeds and in lower concentrations in grains, fruits and vegetables.[6]"

Fatty liver disease

Non-alcoholic fatty liver disease and prediabetes go hand in glove. The organ is simply unable to handle all that glucose pouring in from refined carbs that we are eating; there is a buildup of triglycerides and a terminal condition called steatohepatitis begins.

Add to it excessive spirits and beer and you'll be in the queue for a liver transplant.

All too much trouble

If it's all too much trouble then sitting under the trees you once planted, sipping coffee and watching the grandchildren grow up will probably not be your pleasure; instead pain, pills and doctors will be your constant companions. It is all about the lifestyle "choices" we make.

As for me and my family we want to live, without pain and pills, so we have chosen Robert Frost's "The road less traveled."

"Two roads diverged in a yellow wood,

And sorry that I could not travel both,

I took the one less traveled by,

And that has made all the difference."


Our newsletter is entitled "create a cyan zone" at your home, preserving both yourself, the family and friends, and Mother Earth for future generations. We promise not to spam you with daily emails promoting various products. You may get an occasional nudge to buy one of my books!

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  • Mill your own flour
  • Bake your own sourdough bread
  • Microplastics from our water
  • Alternative types of water storage
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  • Go to bed slightly hungry
  • Keep bees
  • Blue zone folk are religious
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  • What can go in compost?
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  • Harvest and store sunshine
  • Blue zone exercise
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