Dairy alternatives are products made from plant-based sources or other non-daFermented products are foods that have undergone fermentation, a process where natural bacteria break down sugars and starches. Common examples include yogurt, sauerkraut, and kimchi. You might want to eliminate them from your diet due to specific health concerns, personal preferences, or food sensitivities.iry ingredients that provide similar nutritional profiles and flavors to traditional dairy products, such as milk, cheese, and yogurt.