Yeast overgrowth can cause a host of far-ranging problems, from physical to cognitive and mental, some experts say. For that reason, some recommend a candida diet — a low-sugar, low-carb diet — to eradicate excess yeast and bring the gut back into balance. Yet this approach is not without its detractors. Importantly, many experts say the diet is largely unproven and any benefit is likely the result of a general improvement in eating habits.