It feeds off everything - don’t concern yourself with sugar unless you use too much already.
If you only consume sugar naturally available in fruits, vegetables and have desserts in low to moderate amounts you will not be harming yourself at all.
Phil

Food we eat is converted to glucose, which is the energy source for our cells, and also for cancer cells. The reason oncologists and nephrologists recommend cutting down on sugar and other simple carbohydrates is more complex. Here is one link on that: https://news.cancerresearchuk.org/2023/08/16/sugar-and-cancer-what-you-need-to-know/