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In severe cases, a deficiency can even lead to a swollen and inflamed tongue and mouth, known as glossitis
If youre a vegetarian or vegan, or are looking for alternatives to meat and dairy products, there are other foods that contain vitamin B12, such as yeast extract (including Marmite), as well as some fortified breakfast cereals and soy products
About Vitamin B12 Individuals who do not consume animal products or have poor natural absorption may have a vitamin B12 deficiency resulting in fatigue, poor sleep, and low concentration
For borderline results, additional testing with holotranscobalamin or methylmalonic acid/homocysteine levels may be appropriate
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