It's a sad given that man's ability to do incredible harm through ignorance as well as purposeful deceit, sometimes seems to have no .limit.
The fact that our medical profession is not immune to that is not only deplorable, but in effect downright criminal when the only defense is lack of time and interest to keep up with new developments.

Enter the realm of the shady myths...

Sun Exposure Causes Skin Cancer

Does it really? This is perhaps the most pervasive and destructive myth in today’s society, reinforced by expensive media campaigns for sunscreen protection of all kinds. Unfortunately, that trend is contributing to one million unnecessary deaths each and every year, causing about 600,000 deaths from breast and colorectal cancer alone.  You see, the sun is our most important source of Vit D. and deficiency in Vit D is rampant and cause of a host of problems, including all sorts of cancers.
Of course sun exposure can cause cancer....if you burn..However, appropriate sunlight exposure has the ability to prevent more than 16 types of cancer..

Using sunscreen is NOT a good way to limit your sun exposure; in fact, sunscreen is one of the last things you want to put on your body, and sunblock does not stop skin cancer. 

When you wear sunscreen you may not realize you’re creating sun damage because it prevents you from burning – but the damage is still being done on a cellular level -- simply because now you’re staying out in the sun too long, thinking it’s okay since you’re covered in goop. And we are not even talking about the many toxic chemicals that can cause additional problems in your system, and increase your risk of disease.

Milk is good for You.

There may have been a time that this was true, but modern commercial pasteurised milk is not good for you, and should be avoided if you want to be optimally healthy. Milk needs the enzymes it naturally comes with but is lacking in pasteurized stuff, so the caseine in the milk has become undigestible because we don't have the tools to attack it, digest it.

On top of it there is the issue of the hormones, antibiotics and pesticides that are used in modern milk dairies, and the fact that nearly all commercial dairy cows are raised on a lot of grains grains, not grass, like they were designed to. This changes the composition of the fats in the milk they produce, especially the CLA (conjugated linoleic acid) content.
The latter has become widely popular in the form of expensive dietary supplements because of its anti-cancer and fat-fighting properties.(American Journal of Clinical Nutrition)  In fact, CLA is so potent a cancer fighter that animal studies show as little as 0.5 percent CLA in the diet could reduce tumors by over 50 percent. Along with being a cancer fighter, CLA helps the body to rid itself of fat.
But CLA as supplement is not exactly the same and we don't really know if the supplement just mimics the real CLA.
CLA is abundantly present in grass fed dairy and beef.
It is worth your while to try and find grass fed animal products because a number of health benefits:
   *  Increases metabolic rate
   * Decreases abdominal fat
   * Enhances muscle growth
   * Lowers cholesterol and triglycerides
   * Lowers insulin resistance
   * Reduces food-induced allergic reactions
   * Enhances immune system

Whole Grains are Good for You

Even though we do agree that whole grains are better for you than refined grains, whole grains are still not healthy for most people. Why? Because so many of us are either:

   * Overweight
   * Have high blood pressure
   * Have high cholesterol
   * Diabetics

Nearly everyone with these issues has high insulin levels, and would therefore benefit greatly from avoiding all grains -- even whole grains. Because whatever else the case, they are still carbohydrates and it is the carbs that make you fat, that overload your pancreas, cause your insulin problems. By and large our carb intake, whether that be in the form of grains, sugar or HFCS is way too high and cause for serious concern. A lot of free radical activity is carb related.

Fish is Good for You

Of course, prior to the industrial pollution that has now devastated the waters world wide, this was true. Not so anymore. Fish (and shellfish) easily accumulate very high levels of chemical residues from the water they live in. Residues in fish can be as much as 9 million times the amount found in the water!

Sadly, due to the release of 40 TONS, or 80,000 pounds, of mercury into the air and water each year, this once healthy food has now been rendered largely unfit for human consumption. Some of the contaminants now found in fish flesh include:

   * Mercury
   * PCBs
   * Radioactive substances like strontium
   * Toxic metals such as cadmium, lead, chromium and arsenic

Saturated Fat Causes Heart Disease

We have written extensively elsewhere on the site about this very topic.  I’d recommend reading the section Food Science: The Truth About Saturated Fat. Saturated fats from sources like meat, dairy, some oils and tropical plants such as coconut actually provide a concentrated source of healthy energy in your diet.

They also:

   * Provide the building blocks for cell membranes and a variety of hormones and hormone-like substances
   * Slow down absorption so that you can go longer without feeling hungry
   * Act as carriers for important fat-soluble vitamins A, D, E and K.
   * Are necessary for the conversion of carotene to vitamin A, for mineral absorption, and for other biological processes

Part of the scientific confusion relates to the fact that your body is capable of synthesizing saturated fats that it needs from carbohydrates, and these saturated fats are principally the same ones present in dietary fats of animal origin, but it is much harder on your system and there is the likelyhood of developing an insulin problem, or type 2 diabetes.. However, and this is the key, not all saturated fatty acids are the same. In fact, there are more than a dozen different saturated fats with subtle differences that have profound health implications, and if you avoid eating all saturated fats you will suffer serious health consequences.

There is still a link between fat and heart disease. But it’s most likely dangerous TRANS FAT, and not saturated fats that is the problem and the missing link between fat and heart disease.

Here is another link to an anecdotal piece of evidence that we are really on our own. We cannot trust the Diet Dictocrats, the registered Nutritionists and Dieticians, because they seem to work with material and advice that has been outdated for decennia.
Check it out, it would be funny if it wouldn't be so serious.
Michael Eades : Nutritional Ignorance

And further.......
Related links :

the Truth About Saturated Fat

15 Vegetarian Myths that could make your life quite miserable

Trans Fats, NOT Saturated Fats, Increase Diabetes Risk
Dangerous Myths and other Life Threatening Truths
But Above all, we need magnesium, if we want  a healthy heart,
a healthy blood pressure, healthy bones, a healthy brain,  and...
no migraines

and of course  we need Vitamin D, but by now everybody is aware of that one.

and last but not least we may be very deficient in sulfur