Besides using suppliments the main foods which provide vitamin B12 are derived from animals, such as dairy products and eggs.

For people not eating any animal products, yeast extract and other fortified/supplemented foods such as breakfast cereals, soya milks, soya/veggie burgers, and vegetable margarines are all good sources.

Foods high in B12 include clams, liver, trout, salmon, tuna, milk, yogurt, cheese, eggs, ham, and chicken.

You can read more on our Vitamin page: http://www.immunityboost.co.uk/immunity-treatment/vitamin-bio-tablets/