Although there is a wide variety of options for what a vegetarian can eat and how to incorporate those nutrients into their diet, some do not choose to incorporate all the necessary nutrients and as a result, they are deficient in some health guidelines and in the essential daily needs required for optimal health. Vitamin B12 and vitamin D are two nutrients that many vegetarians are deficient in (Pros and Cons of Vegetarianism). Vitamin B12 is obtained by consuming meat, but some studies have shown that some plants are able to provide some B vitamins, but this is not a proven fact. As for B vitamins, meat is the most convenient source to find these nutrients. With a plant-based diet, you usually need more than one serving to get all the necessary and essential amino acids, while meat can provide all the nutrients in a smaller amount. (Vegetarian