It may not be common knowledge, nor generally accepted nutritional advice, but truth is that the most important message that is beginning to emerge at the beginning of the 21st century is that most of our healthproblems are not just only of our own making but also largely manufactured by commercial greed and complete disregard for the scientific findings as far back as the beginning of the 20th century.
It is plain and simple: we have been cheated by corruption and greed and self interest at multiple levels of business interests and government. It has cost us our health and well being and untold grief. The human toll as well as the financial cost is staggering.
The healthcare cost is crippling healthcare and there is still no end in sight.
Although evidence is mounting that our nutritional advice is based on seriously flawed science, there is still little evidence that the evil empire of manufactured diseases is on the wane.
Ever since the move was on to replace our healthy eating habits (no heartdiseases, no diabetes, no stroke, no skin cancer) with manmade processed foods, oils and fats, we have suffered the consequences.
And even though scientific evidence that is more and more pointing the finger at the once revered polyunsaturated vegetable oils, especially the ones (most of them) high in Omega-6, the established and well funded medical world blatantly keeps ignoring scientific findings that we are on the wrong track and instead of promoting healthy food and lifestyles, keeps pushing more and more medication, thus serving the interests of Big Pharma.

" contrast to earlier epidemiologic studies showing a low prevalence of atherosclerotic heart disease (AHD) and type-2 dependent diabetes mellitus (Type-2 DM) in the Indian subcontinent, over the recent years, there has been an alarming increase in the prevalence of these diseases in Indians--both abroad and at home, attributable to increased dietary fat intake. Replacing the traditional cooking fats condemned to be atherogenic, with refined vegetable oils promoted as "heart-friendly" because of their polyunsaturated fatty acid (PUFA) content......"   J Indian Med Assoc. 1998 Oct;96(10):304-7.

Cholesterol and especially the Low density Lipid cholesterol , is still being vilified , athough we now know that cholesterol has never been the problem. At best it is a bio marker for something else.
Concurrence does not indicate causality. You may detect high LDL cholesterol, to draw the conclusion that that is the cause of heart disease, conveniently overlooked the fact that LDL cholesterol goes wherever it is needed, to build to repair, to heal. Damage that may have been done by a completely different agent. The different and now highly suspect agent could quite well be the very thing that everybody thought was going to be the saviour of us all : vegetable oils, polyunsaturated fats.
Or it could have been done by oxidized LDL. And again the suspects are polyunsaturated fats.
The omega-6 polyunsaturated fat, linoleic acid (LA; found abundantly in industrial vegetable oils), is a dominant factor in the susceptibility of LDL to oxidation. LDL is rich in LA regardless of diet, yet the amount of LA in LDL still depends on diet to a certain degree. Thus, on the surface, one would expect a diet high in industrial vegetable oil to promote atherosclerosis. Unfortunately, it's not that simple, because LA also lowers the amount of LDL in the blood of a number of species, including humans.

And it gets more bizarre all the time !
One of the latest is the increasing susceptibility these days of people to skin cancer. We are now being advised to stay out of the sun at all times and cover up as much as possible. Thereby of course losing out on the free and best from of Vit D. Of course the convenient truth (the hole in the ozon layer) is not nearly truthful as we are led to believe.
Myabe you have seen the movie "The  Betrayal"...., about a family of Lao refugees that immigrated to the U.S. in the late 1970s. The director followed the family for 23 years as they tried to carve out a life for themselves in Brooklyn. The main fats in the traditional Lao diet are lard and coconut milk. The mother of the family was a nice looking woman when she left Laos. She was thin and had great skin and teeth, despite having delivered half a dozen children at that point. After 23 years in the U.S., she was overweight and her skin was colorless and pasty. At the end of the movie, they return to Laos to visit their family there. The woman's mother was still alive. She was nearly 100 years old and looked younger than her daughter.
Researchers have been studying the factors that determine  susceptibility to skin cancer, and fat is a dominant one. Specifically,our susceptibility to skin cancer is determined by the amount of linoleic acid in the diet.
The next two links will connect to the results of two studies

It doesn't end at skin cancer. In animal models, a number of cancers are highly sensitive to the amount of linoleic acid in the diet, including breast cancer. Once again, butter beats margarine and vegetable oils. Spontaneous breast tumors develop only half as frequently in rats fed butter than in rats fed margarine or safflower oil (Yanagi, S. et al. (1989) Comparative effects of butter, margarine, safflower oil and dextrin on mammary tumorigenesis in mice and rats. In: The Pharmacological Effects of Lipids.). The development of breast tumors in rats fed carcinogens is highly dependent on the linoleic acid content of the diet. The effect plateaus around 4.4% of calories, after which additional linoleic acid has no further effect.

and  a study by Hopkins, Kennedy and Carroll

Conversely, omega-3 fish oil protects against skin cancer in the hairless mouse, even in large amounts. In another study, not only did fish oil protect against skin cancer, it doubled the amount of time researchers had to expose the mice to UV light to cause sunburn!     See Research paper

Thus, the amount of linoleic acid in the diet as well as the balance between omega-6 and omega-3 determine the susceptibility of the skin to damage from UV rays. This is a very straightforward explanation for the beautiful skin of people eating traditional fats like butter and coconut oil. It's also a straightforward explanation for the poor skin and sharply rising melanoma incidence of Western nations . Melanoma is the most deadly form of skin cancer.

According to one neurobiologist:
"I believe the other factor contributing to rising melanoma incidence is sunscreen. Most sunscreens block sunburn-causing UVB rays but not melanoma-causing UVA rays. The fact that they allow you to remain in the sun for longer without burning means they increase your exposure to UVA. I've written about this before. Sunscreen also blocks vitamin D formation in the skin, a process that some researchers believe also promotes cancer"
Of course you don't have to worry too much about that, that are lots of companies that are willing to sell you a Vit D pill for that. It may be of an inferior quality, but then you just take an extra one right?

Anyone interested in a more thorough analysis of data regarding Lifestyle, Nutrition and health should check out this website:

Ricardo from the website Canibais e Reis has just released a fantastic resource for anyone who's interested in the relationship between nutrition, lifestyle and health.

Only the first few lines are in Spanish
After that the languages alternate  so don't veer away too quickly.

Half way down the page you find on the left : Get Saturated
on the right you find links to several blog pages.

I can whole heartedly recommend :  Whole Health Source (Dr. Stephan Guyenet)
Nutrition and Physical Regeneration

Anybody who still thinks that the drug companies have your best interests at heart, think again....

"bestselling pain-reliever Vioxx withdrawn in 2004 by its maker Merck because it increased the risk of heart attacks and strokes"

"Johnson & Johnson’s birth control patch, now known to cause blood clots, strokes and deaths."

" Lilly’s antipsychotic drug Zyprexa. The company hid the risks (e.g., deaths, strokes, pancreatitis) and exaggerated the benefits of Zyprexa while encouraging primary care doctors to prescribe it for unapproved uses. "

Read the story Here
When there is Commercial gain involved anything goes
but we are getting better informed . . . . are we getting smarter too?
" It has now been demonstrated that both level of dietary lipid intake and degree of lipid saturation have pronounced effects on photoinduced skin cancer, with increasing levels of unsaturated fat intake enhancing cancer expression. The level of intake of these lipids is also manifested in the level of epidermal lipid peroxidation."
Photocarcinogenesis and diet.