The concept behind starving what is considered "bad" bacteria, fungus, and microbes such as certain strains of candida is a twofold process. Both parts of the system are important and likely doing one without the other won't rebalance the microflora and produce success. Dietary intervations, compounds such as oregano oil, etc. will help reduce the population of microflora that has gotten out of balance to create a condition known as dysbiosis. Equally important is to replenish the levels of good bacteria so that the opportunistic flora and the good flora work out in concert. In that sense, the notion that one has "bad" microflora that they need to get rid of through some type of intervention is misleading. A better way to look at it is that what is needed is a rebalancing. What you are trying to achieve is a healthy ecosystem such that the good bacteria will keep the bad bad bacteria, so to speak, in check.
This nutrition facts video makes some interesting points regarding fiber being a prebiotic we need to get our immune system to calm down: http://nutritionfacts.org/video/prebiot ... er-garden/
I've always thought that the success of Wahls diet might have to do with the extreme amounts of veggies she advocates for consuming.