NOTE: before making any changes to your diet or therapy programs, be sure to discuss and get authorisation of YOUR own qualified doctor. The following is for information purposes and does not constitute a recommendation or a diagnosis of any sort. 

Here’s the dangerous thinking that has brainwashed the medical industry and that has become distorted to encourage people to eat more fat in their diets: “Sugar feeds cancers”.

Sounds simple enough, on the face of it. And it makes for a great sound bite. There is some truth to that sound bite, too. To understand what is meant by “sugar feeds cancer” we have to go to the source of the research that started that sound bite.

According to a highly respected doctor, Dr. Otto Warburg: once a healthy cell mutates into a cancer cell, that cancer cell can thrive in a  environment, (the body’s blood environment), rich in OXYGEN or richly supplied by BLOOD SUGAR, called GLUCOSE.

Dr. Warburg discovered that if cancer cells lacked oxygen, cancer cells can thrive because they can replace the respiration of oxygen in normal body cells by a fermentation of [blood] sugar…”  See end Note #1.  

So, even if deprived of oxygen, cancer cells can simply flip over to ferment available blood sugar and thrive on that fermentation. Note that we are talking about BLOOD SUGAR…GLUCOSE and not dietary sources of sugar such as white table sugar.

Glucose is a sugar that your body makes from eating ANY FOOD.

Even if you deprive yourself of all dietary sources of sugar, your body will make blood glucose, (blood sugar).  Every organ in your body, from your brain to your skin, needs that blood glucose for energy, like energy in a battery, to power every cell within the body, both good and bad cells. Even if you eat 100% diet of “protein” from animal sources such as meats, fish, poultry, eggs, and no dietary sugar at all, and no plant food at all, your body will still make plenty of blood glucose, (blood sugar), and in most instances, to make all the blood sugar the body needs.

When we think of “sugar” we seldom think of “blood glucose”. Instead we think of white table sugar and refined white flour which is believed to act in the same way as white table sugar does. Yet the research was not about white table sugar, per se. It was about blood sugar, (blood glucose). Thus, you now know one potential source of confusion…cancers don’t feed on sugar, cancers feed on blood sugar, which is known as GLUCOSE.

Another source of confusion arises from the glib way that the term “starch” is treated among doctors and lay people who are being careless when discussing white table sugar and white flour.

Because both white table sugar and white flour are starches, and because both of those are almost devoid of any nutritional value, they have given starches a bad rap, so to say. White sugar and white flour have become popular synonyms for “starch”. At the mere mention of “starchy food”, people mentally visualise white sugar or white flour and roll ANY starchy food into the same category of foods to be avoided. This has become the second potential source of confusion. You need to learn that all starches are not bad, that plant-based starches can be healthy and can often optimise your health, even if already ill.

Plant-based foods are starches. GOOD STARCHES.  HEALTHY STARCHES and most people should be eating a diet rich and plentiful in these good starches.  But do avoid, as much as possible, those bad starches like white table sugar and white flour.

When someone utters the term “starch”, ask if he or she means white sugar and white flour or the more health-giving, whole plant foods which are often healthy because they are NUTRITIONALLY DENSE.  And that notion of nutritionally-dense foods may be an ideal way to think of what you put in your mouth.

Healthy starches refers to plant-based foods which jam-packed with nutrients such as vitamins, minerals, PROTEIN, FIBER, enzymes, and even thousands of molecules yet to be identified. A rich supply of the right nutrients from plant-based foods, and not the long-term concentrated dosages you get from vitamins pills, is what helps to optimize the long-term health of the human body. Part of that long-term optimization includes the support of your immune system along with your cardiovascular system. A great cardiovascular system allows your immune system to remain healthy and to such scavenger T-cells and other defense mechanisms to the site of an attack, even by cancer cells. It is when your immune system fails to prevent and overpower cancer cells that medical intervention becomes necessary. And we know, now, that once cancer cells win the battle against your immune system, those cancer cells can thrive in either an oxygen-rich or a blood-sugar-rich environment.

Since you can not starve the human body of either OXYGEN or of BLOOD SUGAR, and since, if you starve the body of one, cancer cells will revert to thriving off the other, what’s a person to do to protect themselves from some forms of cancer? Whether as a preventative or as a hopeful cure, eating healthy starches, (nutritionally-dense plant-based foods), may be the helpful answer.


Dr. John A. McDougall helps us to put it altogether. See end Note #2 Take a few minutes to read his newsletter, [linked in end note #2 below].  He provides useful suggestions and also strongly suggests the “…’all-winning’ dietary change…[to] remove carcinogenic poisons, add cancer-preventing phytonutrients, restrict calories painlessly, and improve circulation…and even improve the chances of survival for [some] people with [some forms of ] cancer…” See end Note #2

He’s not the only medical professional or researcher to encourage less animal-source protein and a solid plant-based nutritional program even when ill. Interesting research also comes from many other doctors and researchers but the most interesting may be that of Dr. Colin T. Campbell (PhD.) who discovered that SOME tumours can be switched on and off based on the amount of animal-source protein in the diet introduced to experimental animals. Those animals are believed to have a strong correlation to what happens with humans, too. The bottom line from those experiments? Plant-based foods do NOT SWITCH ON cancer cells nor does such a health starch-based diet encourage any additional tumour growth in some cancers. See end Note #3


  1. THE METABOLISM OF TUMORS IN THE BODY. Warburg O, Wind F, Negelein E
    J Gen Physiol. 1927 Mar 7; 8(6):519-30.
  2. “Does Sugar Feed cancer?”, by Dr. John A. McDougall.  THE MCDOUGALL NEWSLETTER, Sept. 2016. [Click here to read the entire newsletter: Does Sugar Feed Cancer? ]
  3. A couple of videos with Dr. Colin T. Campbell, PhD.  Learn from the wise.  He has wisdom of more than 59 years in the health research field specifically on the subject of NUTRITION and how that affects human health. As he says in one of his video interviews with experts, “the effect is dramatic.”  You can watch one of his informative videos by clicking right here to visit this link:   or you can view this video in which he expands on the same topic about cancer by clicking here or visiting this link: