Fermented soy products are foods made from soybeans that have undergone a fermentation process. This process involves the action of beneficial bacteria or fungi, which break down the soy proteins and sugars, enhancing the nutritional value and flavor. Common examples include tofu, tempeh, and miso. These products are rich in protein, vitamins, and probiotics, making them popular in many diets, especially vegetarian and vegan ones. Fermented soy products can aid digestion and may contribute to heart health. They are widely used in various cuisines, particularly in Asian cooking, where they add depth and umami to dishes.