Feb
08
2014

Sugar As A Cause Of Cancer

It has been known for a long time that cancer cells can survive without the ordinary aerobic pathways of energy production. They can get energy from a metabolic pathway, which bypasses normal cell metabolism (aerobic glycolysis). But many attempts of designing a cancer therapy to exploit this difference have so far been unsuccessful.

This Mayo Clinic website even explains that it would be a myth that cancer would grow better with sugar. The following pieces of research question this myth.

Sugar makes cancer grow faster (activates oncogenes) in fruit flies

In this study from the Icahn School of Medicine at Mount Sinai in New York City fruit flies were used as an animal model. You may ask, why fruit flies; we are not fruit flies, we are humans! As incredible as it sounds, on a cellular level our cell metabolism and the cell metabolism of fruit flies is identical. But the generation time of fruit flies is much shorter and results can be seen in days and weeks. To achieve the same in human trials would take months and years. Also, researchers could breed a strain of fruit flies that was susceptible to develop tumors. When they were fed sugar, the fruit flies developed insulin resistance within a short time. This model was chosen by the researchers as it is known for some time that in humans insulin resistance from diabetes, obesity, and other metabolic diseases leads to a higher risk of developing breast cancer, liver cancer, colon cancer and pancreatic cancer. The researchers wanted to sort out what the metabolic advantage of the cancer cells was under these conditions.

The researchers found that the sugar in the diet activated silent cancer causing genes (called “oncogenes)” in the fruit flies that in turn helped to promote insulin resistance and the development of tumors. Because of the insulin resistance sugar could not enter into the normal body cells, but the tumor was using up all of the sugar allowing the tumor cells to multiply at a rapid rate. The end result was that the sugar from the diet fed the cancer cells directly making them grow faster. Interestingly, when these flies that had developed tumors on a high sugar diet were switched to a high protein/low sugar diet, the tumors stopped growing and were contained.

In this fruit fly example the researchers were subsequently able to block cancer cell growth by special cancer suppressing drugs (acarbose, pyrvinium and an experimental drug AD81), which were given in combination. 90% of the flies given the triple-drug treatment survived to adulthood while control flies not treated with this regimen all died of their tumors.

Although this model was only done in fruit flies and one could question whether or not this was relevant to what is happening in human cancer patients, the following piece of research puts this fear to rest.

Sugar As A Cause Of Cancer

Sugar As A Cause Of Cancer

Human breast cancer cell study in vitro

In January 2014 the American Society for Clinical Investigation published a collaborative study between the Lawrence Berkeley National Laboratory, Berkeley, California, CA and the Hokkaido University Graduate School of Medicine, Japan, which used human breast cells in tissue culture showing that sugar could cause breast cancer.

The original papers of this US/Japanese research team are quite technical and I do not expect you to understand this link where it is published. I posted it for those who want in depth information. The researchers used a simple tissue culture model where they could observe tumor growth in cell cultures under the microscope using a gel where the breast tissue samples were placed side by side with normal breast cells that served as controls. The cell cultures of both normal cells and malignant cells were obtained from the same reduction mammoplasty tissue samples. This way the cell cultures mimicked a situation as close to the reality of what is going on in a woman’s body when breast cancer develops.

The normal breast epithelial cells were seen in culture to get organized as a roundish cell formation (an acinus formation) while the cancer cells were growing as irregular cell clumps. This visual effect was reproducible and is depicted in the paper. With high sugar concentrations in the growth medium breast cancer cells multiplied at a faster rate, not so the normal cells. But some normal cells underwent a transformation into abnormal and cancerous cell types. On the other hand, when sugar concentrations were severely restricted, morphological changes took place where cancer cells slowed down their growth or stagnated while some of them even changed into the normal cell formation (acinus formation). Using various known oncogene stabilizers the investigators could show that the same effect was noted as with the low sugar concentration in the growth medium.

The investigators tested whether other cell lines of breast cancer would show similar results as to the effects of sugar feeding or restriction. They were able to show that high sugar feeding activated cancer cells, no matter where the cancer cell lines originated. The authors discussed that metformin, which is known to control the metabolism in diabetic patients and lowers blood sugar levels, has also been shown to calm down growth of cancer (due to stopping oncogene stimulation), which improves the survival rates of many different cancer types in diabetic patients; it also reduces the risk of developing cancer in those who are taking metformin.

Other investigators have shown in mouse experiments that an impressive lowering of cancer rates could be achieved with low carb diets.

Human evidence for cancer causation and cancer prevention

Several clinical studies seem to indicate that there is a higher cancer rate in diabetics where insulin resistance can lead to activation of cancer producing genes (called oncogenes) and cause various cancers. In this link colorectal cancer and pancreatic cancer are discussed in relationship to diabetes and insulin resistance. High glycemic foods (sugar, starchy foods) were associated with breast cancer, colorectal cancer and endometrial cancer. The majority of trials showed this association although not all. The more obese patients were, the more pronounced the insulin resistance was and the more the relationship to these cancers became apparent. A diet that is high in starchy foods like potatoes, rice and bread is causing pancreatic cancer as was shown by researchers at the Dana-Faber Cancer Institute, Brigham and Women’s Hospital and Harvard School of Public Health. High glycemic diets have shown to cause colorectal cancer, diabetes and being overweight. The Standard North American Diet (SAD) is a pathway to many chronic illnesses due its high load in refined carbohydrates. Ironically the abbreviation for it is “SAD”, which in my opinion reflects adequately its sad influence on health and well being. We know now that sugar and starchy foods lead to insulin overproduction, which in turn causes the metabolic syndrome (also known as “insulin resistance”). This causes the immune system to weaken and fat to be deposited as visceral fat in the stomach area. Visceral fat is metabolically very active as it secretes cytokines like tumor necrosis factor alpha (TNF alpha), COX-2 enzymes and others. Insulin and growth factors from the visceral fat gang up together with the elevated blood sugar, which activates tumor-producing genes (oncogenes) to cause cancer.

While cancer rates are higher in patients with insulin resistance, they were lower in patients who did have normal insulin levels. It is important to concentrate your efforts on normalizing weight, which will normalize insulin sensibility and avoid the development of cancer. Sugar avoidance and avoidance of cereals and starchy foods will help you achieve this goal.

Conclusion

Although the idea that sugar could cause cancer has been around since 1924 (Dr. Warburg), it has taken up to now to be proven in animals and humans.

The purpose of this blog was to show how there is a connection between the consumption of sugar and starchy foods and various cancers in man. Animal experiments are useful in suggesting these connections, but many clinical trials including the Women’s Health Initiative have shown that these findings are also true in humans. It is insulin resistance due to sugar and starch overconsumption that is causing cancer.

We are now in a position to know why people who consume a low carb diet, develop less cancer than people who consume a high carb diet. I have followed such a low carb diet (also known as low-glycemic index food diet) since 2001 and find it easy to follow. However, I do not dispute that it takes some discipline to change the old way of eating to the new one. The benefits are definitely worth it: you are feeling well now and you are staying well as you age.

More information about hyperinsulinism that can cause breast cancer: http://nethealthbook.com/cancer-overview/breast-cancer/causes-breast-cancer/

Last edited Nov. 7, 2014

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Dec
21
2013

Buying Into High Carb, Low Fat Myth Makes You Sick

If you are like most people, you probably still think that “healthy grains” like wheat are good for you and are “essential for a well balanced diet”. Ever since Kellogg’s introduced cereal for breakfast and the bagel was invented as a mid morning snack, which has captured the tastes of millions, the Agro Industry and the food industry have lobbied to have “healthy grains” in the food pyramid or on your plate. The very thought of “the daily bread” is deeply ingrained in our culture.

Other agencies like the Heart Foundation, the Academy of Nutrition and Dietetics (formerly “American Dietetic Association“) and the American Medical Association have reiterated this statement over and over until both the public and physicians accepted this as the truth. However, the scientific data does not support this point of view!  It has been a myth!

We are gradually learning that there has been a big misinformation campaign going on as far back as 1984 (and before) when a consensus panel came up with revised normal values for cholesterol and we as the medical profession were told (myself included) to treat high cholesterol levels much earlier and more aggressively than in the past with statins.

Big Pharma is still pushing for this. Now that I am retired for more than three years I can freely write about what is really going on. The truth has already leaked out, but it is not yet common knowledge.

I like to review the switch from the old school of thought that a high carb/low fat diet would be healthy to the new school of thought that a low carb/high healthy fat diet is healthy. Before you panic, sit back, relax and read what I am saying.

Buying into High Carb, Low Fat Myth Makes You Sick

Buying Into High Carb, Low Fat Myth Makes You Sick

A brief history of the high carb/low fat diet recommendation

It was the Framingham Study, which is an ongoing study since 1948 where a large group of people was followed for decades to sort out what causes heart attacks and strokes and how one could develop a program of prevention. This objective at the beginning of the study was very noble and promising. However, as time went on the results from the Framingham Study that were published intermittently appeared to be more and more confusing.

First there was the lipid theory that was based on the observation that high lipids (called triglycerides) and high cholesterol in the blood would cause heart attacks and strokes. It was assumed that it must have been the fats in the diet that would have caused this. Based on this thinking the lipid theory of arteriosclerosis was formulated, a theory trying to explain how heart attacks were caused.

If this theory were true, a lowering of the blood lipids and cholesterol should have lowered the rates of heart attacks and strokes. Many large trials were done and the statins were developed to lower cholesterol. In a recent blog I have explained that this has not lowered the mortality rates from heart attacks and strokes, but instead of admitting that the researchers made a mistake, many are still doggedly holding on to the dogma of the lipid theory. The truth is that the lipid theory has not been proven to be true; the recommendation of a high carb/low fat diet has also not worked out to save lives by preventing heart attacks and strokes. In fact the opposite is true: older people with high cholesterol live longer and have less Alzheimer’s disease than those with lower cholesterol levels in the blood as Ref. 1 has explained in detail. Dr. Perlmutter mentioned a study from the Netherlands (Ref. 1, page78) involving 724 individuals who on average were 89-year old that were followed for 10 years. Those with high cholesterol lived longer than those with low cholesterol, exactly the opposite of what the lipid theory predicted! Specifically, for each 39% increase in cholesterol there was a 15% decrease in risk of mortality. Think about it: the brain and the heart have LDL receptors on their cell surfaces for a reason. The reason is that both vital organs burn fat and need cholesterol to build up the membranes of the brain and heart cells.

Despite this compelling evidence Big Pharma is in denial and you will still find the lipid theory of arteriosclerosis heavily mentioned on the Internet as the only “valid” explanation for how heart attacks and strokes would be caused.

Inflammation as the alternative explanation of arteriosclerosis

Since the mid 1990’s the first reports surfaced to explain that about 50% of patients with normal cholesterol levels still develop heart attacks. In these patients the C-reactive protein, an inflammatory marker, was very high indicating that an inflammatory process likely caused their illness.

Subsequently further research was able to show that the LDL cholesterol, when oxidized by sugar was responsible for clogged arteries in these patients. It also became apparent that diabetics have a much higher risk to develop heart attacks than patients with normal blood sugars. This led to the conclusion by several different research teams that the lipid theory was wrong and needed to be abandoned.

Instead a new theory has developed that explains that heart attacks and strokes develop in patients where free radicals have damaged LDL cholesterol. This oxidizes LDL cholesterol and leads to hardening of the arteries (arteriosclerosis). Sugar from increased carbohydrate intake has a lot to do with this: it leads to glycation of protein causing glycation end products (abbreviated as AGE’s).

This is an appropriate name as it really is the cause of premature aging, of developing wrinkles, of getting premature hardening of arteries and having a 50-fold risk of free radical formation. This in turn will lead to more tissue aging. LDL used to be thought of as the “bad cholesterol” (I myself have used that term in the past). LDL is now known to be the friendly and important transport form of cholesterol, which is sent from the liver to the brain and heart cells that need it for their metabolism. If LDL is oxidized, however, it becomes useless and the heart and brain cannot absorb cholesterol for membrane synthesis via the LDL receptors. The end result is that vital organs like the heart and the brain do not get enough oxygen and nutrients, which leads to heart attacks and strokes. The free radicals that are released from oxidized LDL cholesterol and that circulate in the blood cause an inflammatory response in the lining of the arteries all over the body, which you know as hardening of the arteries (arteriosclerosis).

This may sound complicated, but all you need to remember is that sugar and starch consumption lead to accelerated hardening of arteries in your body, which causes heart attacks and strokes.

Reassessment of what a heart healthy, brain friendly diet is

The above-mentioned research findings require a complete re-thinking of what a healthy diet would be. The villain turned out to NOT be saturated fat (meat, eggs, butter and avocado), but rather TRANS fat (margarine, hydrogenated polyunsaturated fatty acids) and I agree with the FDA that this should be abolished.  Trans fat is full of free radicals oxidizing LDL cholesterol, which we just learnt is causing hardening of arteries. It is sugar and starches that turned out to be the main villain. Omega-6 fatty acids, found in safflower oil, sun flower oil, grape seed oil and canola oil are bad for you also as they lead to inflammation through the arachidonic acid system in the body. Conversely flaxseed oil, omega-3 fatty acids (EPA and DHA) derived from fish oil are very protective (anti-inflammatory) oils, as is olive oil and coconut oil. These latter two are anti-inflammatory monounsaturated fatty acids. Keep in mind that you want to change the ratio of omega-3 to omega-6 fatty acids more in the direction of omega-3 fatty acids, so that the ratio will be between 1:1 and 1:3. Most Americans are exposed to ratios of 1:8 to 1:16 (too many omega-6 fatty acids in fast food and processed foods), which leads to inflammation of the arteries as well.

The new “heart and brain healthy diet” consists of no refined carbohydrates (sugar and starch), but about 45% complex carbohydrates (organic vegetables like broccoli, spinach, cauliflower, Brussels sprouts, peppers, onions, garlic, peppers, Swiss chard, zucchini, asparagus etc.), 20 % protein and 35% saturated and other fats like omega-3 (1:3 mix with omega-6) fatty acids and monounsaturated fats (like olive oil or coconut oil).

According to Ref.1 you can even eat butter, lard and other animal fats provided they come from clean (not antibiotic or bovine growth hormone treated) animals. Dr. Perlmutter (Ref.1) points out that even extreme diets like the Inuit diet with 80% saturated fat and 20% protein leads to longevity with healthy arteries. The patients who died in the many trials including the Framingham Study did so, because of free radicals from sugar, starch and wheat. Wheat contains the addictive gliadin molecule (part of gluten), which makes people eat more sweets and starchy foods. The liver turns the extra calories into visceral fat deposits that in turn cause the release of cytokines like tumor necrosis factor alpha (TNF alpha) and COX-2 enzymes.

This causes inflammation, heart attacks, strokes and cancer.

Contrary to what Big Pharma wants you to know cholesterol is an anti-inflammatory, LDL is a cholesterol transporter (provided it is not oxidized) and HDL is protective of hardening of the arteries as long as the “ratio of total cholesterol to HDL cholesterol” is less than 3.4 for males and 3.3 for females. This is the cholesterol risk ratio used by cardiologists to determine the risk of coronary artery disease. The average risk of this ratio for Americans is 5.0 for males and 4.4 for females. The ideal ratio to strive for is the “1/2 average risk” ratio of 3.4 for males and 3.3 for women (Ref.2).

Paradigm shift in causation of heart attacks and strokes, but also of cancer, and neurological diseases

As pointed out in Ref. 1 there has been a paradigm shift in our thinking about what causes inflammation and what causes all of the major diseases including premature aging. Many physicians are not up to date in this new thinking although it has been in the medical literature since about 1995. In my colleagues’ defense I like to say that they are busy people and they do not always have the time to do their continuing education. However, it is imperative that the public learns about this paradigm shift as it affects literally everyone. In my YouTube video on the home page of www.nethealthbook.com I have talked about this new thinking in the summer of 2012. Now we are learning that there is an anti-inflammatory, cholesterol containing, fat rich diet without refined carbs, but containing ample complex carbs, which is a modified zone diet or a modified Mediterranean diet that will prevent all these diseases. At the same time it is a weight loss diet as cholesterol and fat in your diet stops the liver from producing lipids and triglycerides and helps you to lose weight. Critics will say that it sounds too good to be true, but I agree with Dr. Perlmutter and Dr. Davis, both of whom have provided ample evidence that it is true. Try some of their recipes. Just read Ref. 1 and 2, where recipes are listed in the back part of their books. Or try the recipes I listed for one day in this blog. I am publishing a book entitled “A Survivor’s Guide To Successful Aging” through Amazon.com, which will come out later in early 2014 where you can find recipes for 1 week in the last chapter.

Conclusion

There has been a paradigm shift in the thinking of how hardening of the arteries is caused. Now it is known that an inflammatory process causes it. It is an overindulgence in sugar, starch and wheat products that causes the liver to produce lipids, cholesterol and leads to the “wheat belly” and the “grain brain”. All of this causes cytokines to bring about an inflammatory reaction that affects the lining of arteries causing heart attacks, strokes, but also Parkinson’s disease, MS, autism, asthma, arthritis, epilepsy, Lou Gehrig disease and Alzheimer’s disease (Ref.1). The inflammation does not stop there. If you keep up the high carb/low fat diet, it will lead to various cancers (Ref. 1 and 3). The solution is a diet high in healthy fats (I would call it a low carb/medium high healthy fat diet) as outlined above consisting of 30 to 35% healthy fat, 20% of protein and 45 to 50% of complex carbs, but none of the refined carbs. I have followed such a diet since 2001. I am enjoying that I can now eat  a reasonable amount of healthy fats, which I was not aware of being allowed before I read Ref. 1 and 3, but I continue with the antioxidant vitamins and anti-inflammatory supplements to prevent LDL oxidization. I hope that many of you can benefit from prevention so you can enjoy a healthy life without being a victim of illness or disability.

More information on:

1. arteriosclerosis: http://nethealthbook.com/cardiovascular-disease/heart-disease/atherosclerosis-the-missing-link-between-strokes-and-heart-attacks/

2. paradigm shift regarding hardening of the arteries: My book “A Survivor’s Guide To Successful Aging: With recipes for 1 week provided by Christina Schilling” explains the content of this blog in much more detail.

References

1. David Perlmutter, MD: “Grain Brain. The Surprising Truth About Wheat, Carbs, And Sugar-Your Brain’s Silent Killers.” Little, Brown and Company, New York, 2013.

2. Life Extension: Disease Prevention and Treatment, Fifth edition. 130 Evidence-Based Protocols to Combat the Diseases of Aging. © 2013

3. William Davis, MD: “Wheat Belly Cookbook. 150 Recipes to Help You Lose the Wheat, Lose the Weight, and Find Your Path Back to Health”. HarperCollins Publishers LTD., Toronto, Canada, 2012.

Last edited Nov. 7, 2014

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