Here is more food for thought. A 2020 article from the Prostate Cancer Foundation website about Dr. Lew Cantley's research. He is Director of the Cancer Center at Weil Cornell medicine.
https://www.pcf.org/c/prostate-cancers-sweet-tooth/
From the article: "Cancer loves sugar, and sugar really loves cancer. Isn’t that sweet? Actually, no, it’s more like a match made in hell – because sugar (glucose) makes many types of cancer grow faster."
And "Scientists have long known that cancers soak up glucose like a sponge; in fact, German physiologist Otto Warburg, who found that tumors extract glucose at a rate 20 to 50 times higher than do normal cells, won the 1931 Nobel Prize for his research on metabolism."
And "But Cantley’s studies suggest that it’s not so much the amount of glucose in your bloodstream that helps promote cancer, as it is the level of insulin, the hormone made by the pancreas that controls glucose."
And "If you are on ADT for metastatic prostate cancer, you are more likely to gain weight, and also to develop insulin resistance. One way to fight this is by limiting your sugar and simple-to-digest carbs. Bonus: keeping insulin down may also help slow down the cancer."
Finally, “The more we learn about cancer metabolism, we are understanding that cancers are addicted to particular things. For many cancers, that thing is sugar.”