Is Cancer Caused By Sugar?

Episode 147 1h 4m


If you or someone you know has had cancer, this episode is going to matter to you. And since the odds are now that 1 in 3 adults in the US will get cancer, this really is a topic that matters to all of us. The school of thought around cancer used to be focused only on the genetic component. But we now know that our environment—the air we breathe, the food we eat, even our relationships—have an enormous cellular impact on our ability to prevent and treat cancer.

I’m excited to sit down with Dr. Jason Fung on this episode of The Doctor’s Farmacy to talk about his amazing work in the field of cancer research and why this environmental component should give us all hope. Dr. Fung and I dive into the role insulin plays in cancer and why the right diet is so imperative in preventing cancer or during the healing process. Insulin acts as a growth factor in the body, which is one of the reasons too much insulin leads to obesity. It’s also why insulin will support the growth of cancer cells. A diet high in sugar and refined carbs lets insulin run wild, which is why dialing in our food choices is so essential in the fight against cancer.

Dr. Fung shares some fascinating results of using fasting and/or the keto diet to dramatically decrease insulin. Fasting has also been found as a useful adjunct to chemotherapy, as it helps to put cells into a quiet repair mode which lessens the really uncomfortable symptoms of chemo most people experience. Cancer patients are often told to eat lots of carbs and sugary foods to keep their weight up—this couldn’t be more dangerous! Dr. Fung and I discuss why previous cancer recommendations are outdated and what the future holds for tackling this growing problem. We also discuss obesogens, autophagy, metabolic disease, and so much more on this week’s episode.

I hope you’ll tune in.


This episode is brought to you by BiOptimizers, Thrive Market, and Apeel. The Doctor’s Farmacy podcast works with a select group of sponsors to allow for ongoing production and allow it to be zero-cost to anyone who wishes to listen to and watch the podcast.

Topics Covered

  • How our understanding of cancer and cancer treatment has shifted over the past several decades

    (2:46 - 7:10)

  • Why cancer medicine has fallen behind other areas of medicine

    (6:55 - 11:19)

  • The major role that diet and nutrition play in the development of cancer

    (8:41 - 13:05)

  • What we can learn about cancer from Inuit people and other populations who historically ate traditional diets

    (12:33 - 16:57)

  • Insulin’s role in cell growth, cancer development, and chronic disease

    (17:23 - 21:47)

  • Snacking, fasting, cancer, and chemotherapy

    (24:38 - 29:49)

  • The ketogenic diet and cancer treatment

    (32:51 - 38:02)

  • The risks of environmental chemicals on the human body

    (35:58 - 41:09)

  • How to reduce your risk of getting cancer, and the link between obesity, type 2 diabetes, and cancer

    (38:46 - 43:57)

  • New thinking around cancer screenings

    (43:56 - 49:07)

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Ep. 147 - Is Cancer Caused By Sugar?