Vitamin B12 is essential for blood formation, the nervous system, and energy metabolism. It occurs almost exclusively in animal products, making vegans and older adults particularly at risk. Here you can see which foods are classified as suitable or unsuitable with vitamin B12 deficiency.
With Vitamin B12 Deficiency, 268 foods are currently allowed and 0 foods are not recommended. Check all foods in the interactive tool above.
Vitamin B12 is found almost exclusively in animal products. The best sources are meat (especially liver), fish, seafood, eggs, and dairy products. Plant-based foods contain no usable B12 unless they are fortified.
Vegans must supplement vitamin B12, as it is not adequately available in a purely plant-based diet. Fortified foods such as plant milks, certain breakfast cereals, and nutritional yeast can contribute, but are usually not sufficient on their own.
Long-term vitamin B12 deficiency can lead to anemia (pernicious anemia), nerve damage (tingling and numbness in hands and feet), memory problems, and fatigue. Nerve damage can be irreversible, making early treatment important.
For mild deficiency, increasing intake of B12-rich animal products may help. For significant deficiency, absorption disorders, or vegan diets, supplements or injections are necessary. The underlying cause should be investigated by a doctor.
The richest sources are liver, mussels, mackerel, salmon, beef, eggs, and dairy products. Plant-based foods contain no natural B12 - vegans must supplement or use fortified products.
Typical symptoms include fatigue, pallor, tingling in hands and feet, concentration problems, mood swings, and burning tongue. Severe deficiency can cause neurological damage. A blood test provides certainty.