Vitamin B12 is an important vitamin that is essential for maintaining body functions like making red blood cells or DNA. You usually obtain it from eating animal foods like dairy products, eggs, fish or meat. Especially when you're on a vegan diet and don't consume any animal products you have an increased risk of developing a vitamin B12 deficiency. In that case or when you're limiting your animal consumption taking a dietary supplement might be a good idea to ensure you're getting enough vitamin B12. We've selected the best brands for you to ensure you're getting the best bio-available supplements that you need.