Kefir is a tangy, probiotic-rich drink made from fermented milk. It is created by adding kefir grains, a combination of bacteria and yeast, to milk, which ferments the lactose and produces a creamy beverage. Kefir is known for its health benefits, including improved digestion and enhanced immune function. This versatile drink can be enjoyed on its own or used in smoothies, salad dressings, and baked goods. With its unique flavor and texture, kefir is a popular choice for those seeking a nutritious addition to their diet, making it a staple in many cultures around the world.