What you need to know about B12 and possible deficiencies
Fact 1: Vitamin B12 is naturally found in animal products, including fish, meat, poultry, eggs, and dairy
Vitamin B12 is naturally found in animal products such as fish, meat, poultry, eggs, and dairy. Although not generally present in plant foods, most plant products add in B12 through fortification. Vitamin B12 is required for healthy brain function, DNA creation, red blood cell formation, homocysteine regulation (an amino acid recognized as a marker for a number of diseases), and used in hundreds of processes and reactions in the body.