Fortified nondairy milk Nondairy milk is popular among those who want a nutritious vegan replacement for dairy milk. While soy, almond, and rice milks are not naturally high in vitamin B12, they are usually fortified, making them an excellent source of this vitamin. One example is soy milk, which can provide up to 86% of the DV for vitamin B12 in 1 cup (240 ml) .