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Does Sugar Feed Cancer? It’s not a simple question!!

June 24, 2014 By Julie Lanford MPH, RD, CSO, LDN

Many people have heard the statement that “sugar feeds cancer”. I
have had patients whose friends, family or other source told them to
completely avoid sugar. I’ve even heard some well-intentioned, but somewhat misguided health professionals tell this to patients!

This series of posts will hopefully set the
record straight regarding what we know about sugar and cancer.

The Facts About Sugar and CancerCancerDietitianGraphic.jpg

Our bodies need sugar, specifically glucose, for energy. Every cell
of our body, especially the brain, needs glucose to live. The sugar that
we need comes from 2 places. One is from the carbohydrate that we eat.

When we eat carbohydrates (either complex carbs, like whole grains or simple carbs like syrups), our body digests them and breaks them down into glucose for the body to use.

The second source of glucose is actually from our body. Our body will make the sugar we need if we
don’t get enough from our food. 

Therefore, even if you cut out all intake of sugar or other form of
carbohydrate, your body will make the sugar you need from fat and
protein. This is not the ideal situation for your body, as it can cause
your body to go into a stressful state. There is a certain amount of
carbohydrate that is important for healthy cell function.

Cancer cells use sugar for energy just like the rest of our body. Cancer does have a higher metabolism than other cancer cells, which is why it takes up sugar at a faster rate and therefore causes the “glow” or “light up” on a PET scan. But
there’s nothing about the cancer that “feeds” on sugar more than any
other cell in our body.

At this point, it has not been shown that eliminating dietary sources of sugar and carbohydrate actually results in slower growth of tumors. It does result in your body having to work extra hard to make the glucose that it needs to function.

Sugar and Insulin

When we digest and absorb sugar from different types of foods, our
bodies produce insulin to process the sugar. This is a normal and
essential part of metabolizing food. However, if you eat too much sugar
or carbohydrate, it results in a large amount of insulin being produced.

Insulin tells our cells to grow. Too much insulin can tell our cells
to grow too much. Some people think that too much insulin could cause
cancer cells to grow more. There’s not enough research right now to
fully understand how insulin and cancer are related, but we know that
too much sugar, and too much insulin is not good for our health.

Bottom Line

Simply put, sugar does feed cancer. BUT, sugar (glucose) also feeds the rest of your body.
For those who are going through treatment, remember that your healthy
cells need energy especially during this time. Avoiding sugar completely
will not help treatment, but it could leave your healthy cells low on
energy.

My next post will address the various sources of sugar and
how you can make the healthiest choices when it comes to your risk for
disease. More from me later!

– Julie

The Mystery of Sugar: How Your Body Digests It and the Difference Between Simple Sugars and Complex Carbs.
Color Matters: White Foods are Cancer Fighting Too!!

Filed Under: Does Sugar Feed Cancer?, Hot Topics, Myth Busting Tagged With: blood, cancer, diet, feeds, fighting, glucose, health, insulin, nutrition, sugar

This post may contain affiliate links for products I recommend. This means if you click on a link and purchase a product, Cancer Services, Inc. will receive a small percentage of the sale at no extra cost to you. We use these proceeds to support cancer patient direct services and community education in the Triad area of North Carolina. For more information, view our disclosure policy.

Comments

  1. Wendy Kaplan says

    January 25, 2016 at 8:47 pm

    Hi Julie – Would it be possible to e-mail all the articles on sugar & cancer? I prefer to read printed out versions, but when I go to print everything, for some reason is cuts off part of the articles. Not sure why!

    Thank you in advance if you can do this.

    • Julie Lanford MPH, RD, CSO, LDN says

      January 25, 2016 at 9:03 pm

      I actually don’t have a print version. You can copy and paste it into a word document. That’s the only thing I could do, although it’s a really good idea to get that In handout version! I will try to get my intern on that this week

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