Things that make you go "Struth!"

I was wading through my Facebook News Feed when I spotted THIS. That article led me to New approach to coeliac testing identifies more Australians at risk, which in turn led me to A novel serogenetic approach determines the community prevalence of celiac disease and informs improved diagnostic pathways (provisional pdf), where I saw: "HLA-DQ2.5, DQ8, or DQ2.2 was present in 56% of all women and men in the community cohorts."
HLA-DQ2.5, DQ8 & DQ2.2 are the alleles for Coeliac/Celiac Disease (CD).

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"Transglutaminase (TG)-2 IgA and composite TG2/deamidated gliadin peptide (DGP) IgA/IgG were abnormal in 4.6% and 5.6%, respectively, of the community women and 6.9% and 6.9%, respectively, of the community men, but in the screen-positive group, only 71% and 75%, respectively, of women and 65% and 63%, respectively, of men possessed HLADQ2.5, DQ8, or DQ2.2."
There were abnormalities in ~5% of Australian women & ~7% of Australian men, even in those who didn't carry CD alleles.

"...but based on relative risk for HLA-DQ2.5, DQ8, or DQ2.2 in all TG2 IgA or TG2/DGP IgA/IgG screen-positive subjects, CD affected 1.3% or 1.9%, respectively, of females and 1.3% or 1.2%, respectively, of men."
~1.6% of Australian women & ~1.3% of Australian men have CD.

From the discussion: "The concept of a ‘celiac iceberg’ has been important in drawing attention to a large, unrecognized group of patients with CD who do report symptoms considered ‘typical’ of CD [29]. Investigators have proposed expansion of the ‘iceberg’ to encompass patients who are genetically susceptible to CD, but show only raised IEL counts or an isolated abnormal CDspecific serology and normal intestinal histology [30-32]. Consequently, there is considerable uncertainty regarding the true extent of gluten-mediated disease in the community.

Random thoughts: About 1 in 20 Australian women & about 1 in 15 Australian men have some kind of a gut problem (IBS?) due to gliadin, even in those who don't carry CD alleles. The following made me smile.
"Making a diagnosis based on a blood test alone or commencing a gluten-free diet without a confirmatory bowel biopsy is inappropriate and can impose an unnecessary and lifelong treatment."
'Cos life without wheat, rye, barley & oats is such an imposition (undue burden) and everyone just loves to be given a bowel biopsy. <- sarcasm alert.

From Ancestry of Australian population: "More than 92 percent of all Australians descend from Europeans. Anglo-Celtic Australians (English, Scottish, Welsh, Cornish or Irish ancestral origin) make up 74 percent of the Australian population."
Most Australians have genes that originate from Britain & Europe. Uh-oh!

Why do only a small percentage of people carrying the CD allele go on to develop CD? I believe that it's down to luck. During digestion, gliadins are snipped into fragments & amino acids by the peptidase enzymes pepsin, trypsin & chymotrypsin. Gliadin fragments that contain the wrong triplet of amino acids and that manage to slip through excessively-loose tight junctions may trigger CD. Once the "damage is done", it only takes a tiny amount of gliadin to provoke an immune response.

So, when & where did it all go wrong?

No, I'm not talking about Demand Five! I'm talking about us, modern man & woman. We have improved hygiene, clean water & food, modern medicine, antibiotics, antivirals etc. We should be enjoying good health and vitality into our nineties. We're not, though. Degenerative diseases like Type 2 Diabetes, Coronary Heart Disease, Cancer, Dementia, IBS etc are afflicting increasing numbers of people (including youngsters) and are even starting to reduce our longevity statistics. Why?

On one side of the fence are the anti-animal fat brigade who claim that animal fats are the cause of all our health problems and that we should all be eating more vegetable fats and reducing our cholesterol.

On the other side of the fence are the anti-carb brigade who claim that carbohydrates are the cause of all our health problems and that we should all be eating less carbohydrates and increasing our fat consumption.

I'm sure you can guess where I am. I have the splinters to prove it!

In 1911, hydrogenated vegetable oil (Crisco) entered the marketplace. So, in 1911, fat turned bad! See The rise and fall of Crisco.

Interestingly, rates of Coronary Heart Disease started to rise from 1920, 9 years later. Co-incidence?

Our genes may have not changed much in the last few hundred thousand years, but our lifestyles certainly have. We now live mostly sedentary lives (which makes our muscles less sensitive to insulin). We now live and work mostly indoors (which makes us deficient in Vitamin D).

We now don't eat much oily fish. Our vegetables contain much less omega-3 fat than they used to (to make them stay fresh for longer). Our meat now contains much more omega-6 and much less omega-3 fat than it used to (due to feeding animals on grains). These changes make us deficient in omega-3 fat (which makes our muscles less sensitive to insulin).

We now eat loads of refined carbohydrate (which causes unstable blood glucose & insulin levels) and loads of processed foods (which makes us deficient in Magnesium and fibre/fiber).

As a result of all of the above changes, we have many modern diseases.