Because of the similar form of the grains, milk and water kefir are often associated. However, they differ in various ways: Ingredients: Milk kefir is made with milk and kefir grains, while water kefir is made with fruit, sugar, water and water kefir grains. Texture: Milk kefir has a creamy consistency, while water kefir is lighter and more effervescent. Nutritional Content: Milk kefir is rich in calcium and protein, while water kefir is lower in calories and lactose-free. These distinctions provide a range of options to suit different preferences and dietary requirements.