
Vitamin B12 is an essential nutrient that plays a vital role in orchestrating key body functions, including DNA synthesis, red blood cell formation, nerve function, and converting food into energy. Since the human body cannot produce vitamin B12, it must be obtained through diet or supplements. While most people in the US get enough vitamin B12 from their diet, certain individuals may be at risk of vitamin B12 deficiency and may need to add more vitamin B12 to their diet. This includes older adults, people with gastrointestinal issues, those on specific medications, and those following a vegan or vegetarian diet.
How to add vitamin B12 to your diet
| Characteristics | Values |
|---|---|
| Natural sources | Red meat, fish, poultry, eggs, milk, and other dairy products |
| Fortified foods | Breakfast cereals, nutritional yeast, plant milk, and certain bread |
| Supplements | Tablets, liquids, chewables, sublinguals, injections |
| At-risk groups for deficiency | Vegans, vegetarians, older adults, people with gastrointestinal issues, people with certain medical conditions |
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What You'll Learn

Eat more clams, liver, and trout
Clams are small, chewy shellfish that are packed with nutrients. They contain very high concentrations of vitamin B12. You can get over 7,000% of the daily recommended value in 20 small clams (190 grams). Clams are also a great source of iron, with almost 200% of the daily recommended value in a 100-gram (3.5-ounce) serving. They are delicious in pasta dishes or stews, like Cioppino or Manhattan clam chowder. Steam them until the shells crack open, or boil for about five minutes after the shells open.
Liver and kidneys, especially from lamb, are rich in vitamin B12. A 3.5-ounce (100-gram) serving of lamb liver provides 3,571% of the daily recommended value for vitamin B12. Lamb's liver is also very high in copper, selenium, and vitamins A and B2. Lamb, veal, and beef kidneys are also excellent sources of vitamin B12, providing about 3,000% of the daily recommended value per 3.5-ounce (100-gram) serving.
Trout is a fatty fish and a great source of vitamin B12, with 225% of the daily recommended value in 3 ounces of wild rainbow trout. Trout is also a great source of vitamin D, omega-3 fatty acids, protein, and minerals such as manganese, phosphorus, and selenium. It is a healthy and tasty option when grilled with a little extra virgin olive oil and served with garlic-sautéed spinach and a baked sweet potato.
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Consume fortified foods, like cereals
Fortified foods are those that have been enhanced with vitamins and minerals that are not originally present in the food. Fortified cereals are a good source of vitamin B12, especially for those who follow a plant-based diet. Vitamin B12 is only naturally found in animal products, so fortified cereals are a great alternative for vegans and vegetarians.
Fortified cereals are an easy and convenient way to increase your vitamin B12 intake. Look for cereals that are low in added sugar and high in fibre or whole grains. For example, Malt-O-Meal Raisin Bran offers up to 62% of the DV for vitamin B12 in just one cup (59 grams). This cereal also provides 29% of the DV for vitamin B6, as well as good amounts of vitamin A, folate, and iron. Research has shown that consuming fortified cereals daily can effectively increase vitamin B12 concentrations in the body.
It is important to read the nutritional information on the product to ensure that it contains vitamin B12. The nutritional facts label will indicate whether the food has been fortified with vitamin B12. By checking the label, you can make an informed choice about the cereals you consume to boost your vitamin B12 levels.
Fortified cereals are a simple solution for those looking to add vitamin B12 to their diet. They offer a plant-based option for those who do not consume animal products and provide a convenient way to ensure you are getting sufficient amounts of this essential nutrient. By incorporating fortified cereals into your diet, you can improve your overall health and well-being.
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Take vitamin B12 supplements
Vitamin B12 is an essential nutrient that your body cannot produce on its own, so you must obtain it from external sources. While it is generally recommended to obtain nutrients from food and beverages, vitamin B12 supplements are a viable option for those who cannot meet their B12 requirements through diet alone.
Vitamin B12 supplements are available in various forms, including tablets, liquids, and injections. If you opt for oral supplements, you can choose between swallowing, chewing, or dissolving them in your mouth. Sublingual administration, which involves placing the supplement under your tongue, is also an effective method of delivery.
Before taking any supplements, it is essential to consult your healthcare provider or pharmacist. They can advise you on the appropriate dosage and help you select a supplement that suits your needs. Additionally, they can guide you in choosing a supplement that is safe and of good quality.
Vitamin B12 supplements are particularly important for individuals who follow a vegan or vegetarian diet, as B12 is naturally found only in animal products. Older adults, people with gastrointestinal conditions, and those taking certain medications are also at a higher risk of B12 deficiency and may require supplements.
It is worth noting that while supplements can help ensure adequate B12 intake, they should not replace a well-balanced diet. Food should always be the primary source of nutrition whenever possible.
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Eat animal products, such as meat and eggs
Vitamin B12 is an essential nutrient that the human body cannot produce on its own. It is naturally found in animal food products, including meat, poultry, and eggs. Therefore, eating animal products is a great way to add vitamin B12 to your diet.
Meat is a significant source of vitamin B12. Red meat, in particular, is known to contain substantial amounts of this nutrient. Organ meats, such as liver and kidneys, are especially rich in vitamin B12. For instance, a 3.5-ounce (100-gram) serving of lamb liver provides an impressive 3,571% of the Daily Value (DV) for vitamin B12. Similarly, lamb, veal, and beef kidneys offer about 3,000% of the DV per 3.5-ounce (100-gram) serving.
Eggs are another excellent natural source of vitamin B12. They are considered an animal product, and thus, provide this essential nutrient. While the individual contribution of eggs to vitamin B12 intake may be relatively lower compared to other animal products, they still play a vital role in maintaining adequate vitamin B12 levels.
Consuming animal products such as meat and eggs is especially important for individuals who follow a diet rich in plant-based foods. The risk of vitamin B12 deficiency increases when one consumes a diet low in animal products. Therefore, including meat and eggs in your diet can help ensure sufficient vitamin B12 intake and reduce the likelihood of deficiency.
It is worth noting that while meat and eggs are excellent sources of vitamin B12, a well-rounded diet should also include a variety of other foods. Excessive consumption of red meat has been associated with certain health concerns. Therefore, it is recommended to balance your diet and consult a healthcare professional or a registered dietitian for personalized advice regarding your vitamin B12 intake.
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Speak to a doctor about B12 injections
If you think you may have a vitamin B12 deficiency, you should consult a doctor. A doctor may prescribe vitamin B12 injections to treat a vitamin B12 deficiency. These injections are typically recommended for people whose bodies struggle to absorb vitamin B12 and those who have undergone gastric surgery. This is because the injections enable the body to absorb vitamin B12 without going through the digestive system.
Vitamin B12 injections are also usually recommended for older adults, vegans, and vegetarians, as these individuals are at a higher risk of vitamin B12 deficiency. If you follow a strict vegan or vegetarian diet, you may need to take vitamin B12 injections for life.
If you are experiencing neurological symptoms caused by a vitamin B12 deficiency, you will be referred to a haematologist, who will advise on the course of treatment. In this case, you may need to have injections every two months.
Vitamin B12 injections are generally well-tolerated, but some people may experience side effects such as dizziness. If you experience any side effects, you should consult your doctor.
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Frequently asked questions
Vitamin B12 is found naturally in animal products, such as meat, fish, eggs, and dairy. Some of the best sources include clams, liver, and trout.
Fortified foods are foods that have been enhanced with vitamins and nutrients that they do not naturally contain. Fortified foods that contain vitamin B12 include certain breakfast cereals, nutritional yeast, plant milk, and bread.
People who are at risk of vitamin B12 deficiency include older adults, those on certain medications, those with gastrointestinal issues, and those following a vegan or vegetarian diet.
Vitamin B12 deficiency can be treated with vitamin B12 supplements or injections. It is recommended that you consult a healthcare professional before taking any supplements.
Symptoms of vitamin B12 deficiency include weakness, fatigue, tingling in the extremities (neuropathy), and cognitive changes.





































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