I disagree with this. Simple sugars in ample amounts is bad for the human body in a variety of ways, but considerations of cancers are not one if them. I disagree with the "seedoil" fads as well, with the exception of anything covered under the rule of thumb of EVERYTHING IN MODERATION.
Discussion
We don't need poisons in moderation. In the US, the seed oils are drowning in both pesticides and harmful industrial solvents that are known carcinogens.
I know enough about much of the processing equipment to know that they are not testing often enough or in the correct process points to be able to get accurate numbers for how much of other of those classes of chemicals are in final products.
Again: in the US. Europe does have much better food standards.
Also:cancer cells can't really survive if ketones. Not consuming carbs is one of the surest ways to naturally prevent growth of cancers or even shrink tumors.