Vitamin B12


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Vitamin B-12 is an essential vitamin. Low blood levels of B12 can cause: Anemia and pernicious anemia, loss of balance , numbness or tingling in the arms and legs, and weakness

Mastering Normal B12 Levels: The Ultimate Guide

Vitamin B-12 is an essential vitamin. Low blood levels of B12 can cause: Anemia and pernicious anemia, loss of balance , numbness or tingling in the arms and legs, and weakness

Vitamin B12, also called cobalamin, is a water-soluble vitamin that has a key role in the normal functioning of the brain and nervous system and the formation of red blood cells.

Vitamin B12 Blood Test: Why B12 Is Important and Why You Should Test For it

The vitamin B complex includes many B vitamins, such as vitamin B3, B6, B9, B12, and others. All of these vitamins are important, but vitamin B12 is particularly significant for the proper functioning of your nervous system.

Vitamin B12, also called cobalamin, is a water-soluble vitamin that has a key role in the normal functioning of the brain and nervous system and the formation of red blood cells. It is one of eight B vitamins. It is involved in the metabolism of every cell of the human body, especially affecting DNA synthesis and fatty acid and amino acid metabolism. Humans are incapable of producing vitamin B12. Some substantial sources of B12 include animal products such as red meat, dairy, and eggs; fortified food products; and dietary supplements. It has been proven to impact memory, cognitive function, physical mobility, and overall health. Incorporating food sources rich in vitamin B12 into your diet is an easy way to maintain healthy levels of this essential nutrient. If you follow a plant-based diet, supplementation is essential to mitigate the increased risk of vitamin B12 deficiency.

That's why you should be interested in doing a vitamin B12 blood test. This type of test is inexpensive, and it gives you a lot of information when it comes to your health. Keep reading to learn more about the importance of vitamin B12 in the body.

Vitamin B12 and Serum Folate

Vitamin B12 and folate are essential for the production of red blood cells and DNA synthesis. The normal B12 levels in the blood range from 200 to 900 picograms per milliliter (pg/mL). However, folate deficiency can lead to anemia and other health issues. Therefore, it is important to maintain normal levels of both vitamins in the body. A simple blood test can determine if you have adequate levels of B12 and folate. If your levels are low, your healthcare provider may recommend supplements or dietary changes to improve your levels and prevent complications.

What are normal B12 levels in the body?

Normal B12 levels in the body typically range from 200 to 900 picograms per milliliter (pg/mL). Levels below 200 pg/mL are considered deficient, while levels above 900 pg/mL are considered high. It's important to consult with a healthcare professional to interpret your B12 levels accurately.

Diagnosis - Vitamin B12 or folate deficiency anemia

Vitamin B12 and folate are essential for the production of red blood cells in the body. A deficiency in either can lead to anemia, which is a condition where there are not enough red blood cells to carry oxygen around the body. Symptoms may include tiredness, weakness, and shortness of breath. If you suspect a deficiency, your doctor can perform tests to diagnose Vitamin B12 or folate deficiency anemia. Treatment usually involves increasing intake through diet or supplements.

Complications of Vitamin B12 or folate deficiency anemia

Vitamin B12 and folate are important for the production of red blood cells in the body. Deficiency in these vitamins can lead to complications such as megaloblastic anemia, which causes fatigue, weakness, and shortness of breath. If left untreated, it can lead to more serious complications like nerve damage, dementia, and depression. That's why it's important to maintain normal B12 levels by consuming a balanced diet that includes foods rich in these vitamins or taking supplements if necessary. Regular blood tests can also help detect any deficiencies early on and prevent complications from arising.

Vitamin B12 Supplements

Supplements can be an effective way to maintain normal B12 levels in the body. Individuals who have a deficiency or difficulty absorbing B12 from their diet may benefit from supplementing with B12. Supplements come in various forms such as pills, capsules, and injections. It is important to note that supplements should not be taken without consulting a healthcare professional as excessive intake of B12 can lead to negative side effects. Regular monitoring of B12 levels through blood tests is also recommended to ensure that supplement dosage is appropriate for individual needs.

Vitamin B12 Intake

Vitamin B12 intake is essential for maintaining normal B12 levels in the body. The recommended intake of B12 is 2.4 micrograms per day for adults. However, some people may require more due to certain medical conditions or dietary restrictions. Vitamin B12 is crucial for nerve function, red blood cell production, and DNA synthesis. Deficiency can lead to various health problems, including anemia, neuropathy, and cognitive impairment. It's important to ensure adequate intake through diet or supplements to maintain normal B12 levels and prevent deficiency-related health issues.

Low Vitamin B12 May Increase the Risk of Cognitive Decline and Dementia

Low levels of vitamin B12 may increase the risk of cognitive decline and dementia in older adults. Vitamin B12 is important for maintaining healthy nerve cells and producing DNA, as well as helping to prevent a type of anemia that can make people feel tired and weak. Studies have shown that low levels of vitamin B12 are associated with cognitive decline and dementia in older adults. It is important to get regular check-ups and maintain normal B12 levels to help reduce the risk of dementia and other cognitive impairments.

Symptoms of Low Vitamin B12 in the Blood

Vitamin B12 is also known as cobalamin. It helps with the formation of red blood cells and prevents memory problems. However, this vitamin can get depleted. You can take it from animal products, various other foods, or supplements too.

The symptoms of vitamin B12 deficiency are numerous, and they can disturb the quality of your life. For example, chronic fatigue and muscle weakness are common symptoms of having too little vitamin B12 circulating through your bloodstream.

That's because this vitamin helps to make more red blood cells. These cells are responsible for transporting oxygen throughout your body. If you don't get enough oxygen for tissues, muscles, and organs, you'll feel weak and exhausted most of the time.

On top of that, too little oxygen in vital tissues can cause dizziness. You might get confused and even experience shortness of breath from time to time. These are all related to having too little vitamin B12 in your blood.

Vitamin B12 deficiency also causes a tingling sensation in your hands and feet. Remember that this vitamin is paramount for the correct functioning of your nervous system. Too little vitamin B12 might cause nerve damage in the long run, and you'll feel this as "needles" through your extremities.

Your optic nerves also require a decent quantity of vitamin B12 to function correctly. If you are deficient in this vitamin, you might struggle with blurred vision or other types of eyesight problems in the long run.

Lastly, your nervous system influences your emotional system, or how you feel every day. Having less vitamin B12 might lead to mood swings, irritability, and mild anxiety and depression in specific individuals.

Who is at Risk of Low B12 Blood Levels?

Low vitamin B12 blood levels occur when the body does not get or is unable to absorb the amount of vitamin that the body needs. There is a higher incidence of low B12 in:

  • Many people over the age of 50 lose the ability to absorb vitamin B12 from foods.
  • People who follow a vegetarian or vegan diet should try to eat vitamin B12-fortified foods or talk to their health care provider about taking B12 supplements.
  • People who have had gastrointestinal surgery, such as weight loss surgery, lose the ability to absorb vitamin B12.
  • People who have digestive disorders, such as Celiac or Crohn's disease, may not absorb enough vitamin B12.
  • People taking metformin, proton pump inhibitors (PPIs), and alcohol since they can decrease B12 absorption

What Are the Risk Factors for Vitamin B12 Deficiency?

Some people are more exposed to vitamin B12 deficiency in comparison with others. For example, people over the age of 50 might have trouble metabolizing this type of vitamin from food. They might need adequate supplementation of vitamin B12 in the form of pills to meet their daily needs.

People who struggle with autoimmune diseases such as celiac disease or Crohn's disease also have impaired absorption of vitamins from food. If you currently deal with an autoimmune disease, you might want to consider getting a vitamin B12 supplement.

What Are the Benefits of Having Normal B12 Levels?

You might be happy to find out that there are plenty of benefits to having sufficient B12 in your body. Remember that this is an essential nutrient that impacts your nervous and cardiovascular systems. Here are some of the essential advantages of having normal B12 levels:

B12 Prevents Anemia

Anemia is characterized by a lack of energy, brain fog, and even dizziness. It results from a lack of iron, but it can also be due to organs and tissues not receiving enough oxygen. Since vitamin B12 is responsible for making red blood cells that transport oxygen, having a B12 deficiency can lead to complications such as folate deficiency anemia, putting individuals at a higher risk of developing more severe symptoms and complications, including neurological symptoms.

Adequate intake of vitamin B12 is also known to give you an energy boost throughout the day. This means you can accomplish more, be more productive at work, and generally not get tired that easily.

B12 Prevents Bone Loss

Bone density tends to drop with age. When this happens, your bones become more brittle and susceptible to fractures. A lack of calcium is usually associated with bone loss. However, multiple studies show that vitamin B12 deficiency is also associated with bone density problems and bone loss.

Another significant bone-loss condition is osteoporosis. This is common among people of elderly age, and it might lead to painful fractures and brittle bones that break easily. Sufficient levels of vitamin B12 might protect seniors against osteoporosis and other similar bone-related conditions.

B12 Prevents Depression

Anxiety and depression are more popular than people think among the general population. A lack of sufficient stomach acid and vitamin B12 is just one of the many factors that can contribute to such emotional issues. Scientists don't fully understand why, but not having enough stomach acid to separate vitamin B12 from food might predispose you to mood swings, chronic anxiety, and depression.

B12 Prevents Hair and Skin Problems

Apart from maintaining bone health and proper red blood cell production, vitamin B12 also plays an important role when it comes to your hair, skin, nails, and nerve function. Hair and skin problems are frequently associated with vitamin B12 deficiency. If you want to prevent skin problems, brittle nails, and hair loss and maintain optimal nerve function, consider taking a vitamin B12 supplement. Additionally, high levels of vitamin B12 can increase your risk for cancer or be a sign of liver disease and certain types of leukemia.

B12 Might Decrease Your Homocysteine Levels

Your body produces homocysteine, an amino acid, after it breaks down proteins. In normal quantities, homocysteine is not a problem for your health. However, if homocysteine levels get elevated, this could affect your body in the long run.

For example, high homocysteine levels are commonly associated with cardiovascular diseases, including atherosclerosis, heart attacks, and stroke. Medical doctors have found out that a lack of vitamin B12 causes elevated homocysteine levels.

Therefore, if you balance your B12 levels, your homocysteine levels should naturally decrease. As a result, you're less likely to develop life-threatening cardiovascular problems.

B12 May Slow Down Cognitive Decline

A recent study published in the health journal Neurology suggests that older adults who consume a balanced diet rich in vitamin B12 may reduce their risk of Alzheimer's disease and dementia in their later years. Supplementing vitamin B12 can be beneficial if you have a difficult time consistently including foods in your diet that are rich in B12 or if you have a condition (or high activity level) that can deplete B12 from your body. Not only is vitamin B12 essential for boosting brain power, but it is also needed for the process of converting carbohydrates, fats, and proteins from food into energy. Vitamin B12 also helps form healthy blood cells and may aid in the prevention of heart disease. Supplementing vitamin B12 is very cheap and easy. There are two common types of vitamin B12 that are marketed: cyanocobalamin and methylcobalamin. If they have issues absorbing vitamin B12 from food sources, oral supplements or injections of the vitamin can help prevent symptoms and complications.

Order a Vitamin B12 Blood Test to Check Your Levels Quickly!

Fortunately, there is a simple and efficient way you can test your B12 levels. You can order a blood test online and receive the results confidentially by mail.

To get exceptional value for your money, go to today and order the vitamin B12 blood test. You will receive the results back in just a few business days.



  1. Go to the "Find a Location" page to find the closest lab location. No need to make an appointment since walk-ins are welcomed. Once you have identified your closest location, go to step 2.

  2. Go to "Choose a Test" and add your selection (s) in the shopping cart. If you prefer to save money on bundled tests, we have created "Lab Test Panels" that can help you decide what to order.

  3. If you have a discount coupon code, add it to your cart.

  4. A $8 lab processing fee will be added to your total.

  5. Pay using a credit card.

  6. You will receive an order confirmation and instructions email on how to download your lab request.

  7. Print lab request form that you downloaded.

  8. Take that form to the closest location. Get your blood drawn.

  9. You will receive an email when the results are ready for you to download.

    Note: You cannot place an order under someone else's profile. The profile person's name will appear on the lab order form.


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