Vitamin B-12 is a component of many a food choice available today. Most commonly it is found in dairy products, such as milk, cheese, yogurt, and also sour cream, but other sources of this vital nutrient may also be employed. They usually are associated with eggs as well as meat and fish sources. Even though researchers have attempted to synthesize vitamin B-12 from algae and plant sources found on land, thus far there has been no success at finding a non-meat, non-ovum, or non-dairy source.