Whole30 is a diet that encourages consuming whole foods and eliminating processed foods, sugar, alcohol, grains, legumes, and dairy. Nutritional yeast is technically a processed food, but it is often made by culturing yeast with beet molasses and sugarcane, therefore it is not strictly Whole30 compliant. However, it is generally considered permissible due to its high nutritional content and the fact that it doesn't typically trigger cravings or disrupt digestion, goals central to the Whole30 diet plan.