IR and cardiovascular: https://www.jci.org/articles/view/10762
IR and dementia: http://www.ncbi.nlm.nih.gov/pubmed/12467491
IR and obesity: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4038351/
IR and hypertension: http://www.ncbi.nlm.nih.gov/pubmed/7512468
Citation needed. ;)
But seriously - what would you like me to cite? That we are consuming incredible amounts of sugar or food coloring? Or that high sugar consumption leads to type 2 diabetes, which usually starts with un-daignosed insulin resistance? Or that the world population is consuming more sugar in the last two centuries? Or that there is a link between metabolism and obesity, or between obesity and all aforementioned symptoms and diseases?
It's all mostly common knowledge really...
Sugar consumption is probably not all that different from tobacco smoking - I wouldn't be surprised if some 10 years from now we will see lawsuits against sugared drink vendors claiming that they didn't adequately warn their consumers of the dangers of sugar consumption.
Edit in Reply:
I would like you to cite gold-standard scientifically verified evidence, not "common knowledge." As far as I know, insulin resistance is not known to cause the myriad of diseases you mention. It is merely an early warning sign of diabetes.
If you wish to challenge the text books, you better come with peer-reviewed and independently verified studies.
Also, you're getting the scientific method backwards. If you assert a fact, you're the one who has to prove it. The burden of proof lies on you to demonstrate that the current medical evidence is wrong.
As said two thousand years ago, "The proof lies upon him who affirms, not upon him who denies; since, by the nature of things, he who denies a fact cannot produce any proof." [0]
[0] Just in Case - http://www.revistaamicac.com/Insulin%20Resistance%20-%20What...
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Huh. You're right. Thanks for the sources.
It's not definitive research, but it's certainly very convincing. Doctors often act on less, including single patient case studies.