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Can B12 Supplements Cause Anxiety Symptoms?

Can B12 Supplements Cause Anxiety Symptoms?

Nov 03, 2022

According to the Anxiety and Depression Association of America, anxiety disorders are now the most common mental illness in the U.S. affecting 40 million adults each year. Can B12 supplements cause anxiety?

Some studies suggest that certain vitamins, including B12, can cause or worsen anxiety symptoms, while others find no link between vitamin supplementation and anxiety. It is possible that certain individuals may be more susceptible to the anxiety-inducing effects of vitamins, and more research is needed to determine whether vitamins can indeed trigger anxiety in susceptible individuals.

Let's take a closer look at what B12 is, how it affects our bodies and minds, and can B12 supplements cause anxiety or alleviate anxious feelings.

Table of Contents

What is Vitamin B12 and Why Do We Need It?

B12 is a water-soluble vitamin that is part of the B complex group of vitamins. It is important for the metabolism of every cell in the body and for the synthesis of DNA.

Vitamin B12 is found naturally in animal foods such as meat, poultry, fish, and eggs. It is also added to some fortified foods such as cereals and nutritional yeast.

B12 helps the body convert fats and proteins into energy and is necessary for the synthesis of DNA.

B12 is also important for the nervous system, and a deficiency can lead to fatigue, weakness, and depression.

Most people get enough B12 from their diet, but some groups of people are at risk for deficiency. These include vegetarians and vegans, people with malabsorption disorders, and the elderly.

Supplementation may be necessary for these groups of people.

Can B12 supplements cause anxiety?

B12 supplements are generally safe, but they can cause side effects in some people. These include diarrhea, headache, and dizziness.

If you experience any of these side effects, stop taking the supplement and consult your doctor.

Key Takeaway: B12 supplements are generally safe, but they can cause side effects in some people, such as diarrhea, headache, and dizziness. If you experience any of these side effects, stop taking the supplement and consult your doctor.

Side Effects from Vitamin B12 Supplements

Do you ever feel anxious or nervous for no reason? You may be surprised to know that your feelings could be caused by a vitamin B12 deficiency.

If you're deficient in vitamin B12, you may experience symptoms such as fatigue, memory problems, and depression. A vitamin B12 deficiency is usually treated with supplements, but you can also get it from food sources.

Some people experience nausea, stomach aches, and other symptoms when they take vitamin B12. This is most often the case when they take B12 supplements orally.

All B vitamins are metabolized by bacteria and fungi. If taking Vitamin B12 causes you to have digestive problems, then you most likely have a bacterial or fungal overgrowth.

If this is your issue with vitamin B12, then an injection of vitamin B12 should resolve it as it bypasses the overgrowth.

Can B12 supplements cause anxiety?

A common side effect of taking vitamin B12 is anxiety and insomnia. Other B vitamin supplements can also do this, but it's rare.

If you've been having palpitations, it could be from vitamin B12.

If you know for certain that you only ingest vitamin B12, either orally or through a syringe, and you start feeling anxious or your heart starts beating fast, try only ingesting a very small amount of it. Start out with a small amount and work your way up to larger amounts.

Once you’ve found the dosage that does not cause these symptoms, your body will get used to the supplement and you won’t have to deal with these side effects. Sometimes anxiety and heart palpitation occurs when there is a lack of vitamin. As a result, the body gets very stimulated by vitamin B12.

The bacteria that cause the digestive problems that can come from taking vitamin B12 can also sometimes cause these anxiety and heart problems. But we wouldn’t expect that same thing to happen if you take the injection.

Can B12 Supplements Cause Anxiety?

We all know that vitamins and minerals are essential for our overall health and well-being.

But did you know that taking too much of certain vitamins can actually be harmful?

How can B12 supplements cause anxiety?

While B12 supplements are generally considered safe, taking too much can actually cause anxiety. This is because B12 can interact with other medications and supplements, and it can also build up in your system if you take too much.

If you are feeling anxious or stressed, it's important to talk to your doctor before taking any supplements. They can help you figure out if B12 is the right supplement for you, and they can also monitor your B12 levels to make sure you're not taking too much.

Benefits of Vitamin B12 Supplements

Vitamin B12 is an essential nutrient that helps keep the body's nerves and blood cells healthy. It also helps make DNA, the genetic material in all cells.

Vitamin B12 is found naturally in animal products, such as meat, fish, and poultry. It can also be made in a laboratory.

Most people get enough vitamin B12 from their diet. However, some people may not get enough of this vitamin if they don't eat enough animal products or if the body can't absorb it properly.

Vitamin B12 deficiency can cause anemia and other serious health problems. Vitamin B12 supplements are available in many forms, including tablets, capsules, and liquids. They can also be given as a shot.


Some people take vitamin B12 supplements to prevent or treat vitamin B12 deficiency. Vitamin B12 supplements can also be used to treat certain other conditions, such as depression, memory problems, and fatigue.

Vitamin B12 is generally well-tolerated. However, some people may experience side effects, such as diarrhea, constipation, or upset stomach.

If you're considering taking a vitamin B12 supplement, talk to your doctor first to see if it's right for you.

Key Takeaway: Vitamin B12 is essential for maintaining healthy nerve and blood cells, and for making DNA. It is found naturally in animal products, and some people may need supplements if they don't eat enough of these products or if their bodies can't absorb the vitamin properly. Vitamin B12 supplements are generally safe but may cause side effects in some people.

Vitamin B12 is an essential vitamin that is found in many foods, including meat, poultry, fish, and dairy products. This vitamin is important for many functions in the body, including the formation of red blood cells, the maintenance of nerve cells, and the production of DNA. A lack of vitamin B12 can lead to anemia, fatigue, and neurological problems.

Some research has suggested that vitamin B12 supplements may have an anxiolytic effect, which means that they could help to reduce anxiety. However, most of this research has been done on animals, and it is not clear if the same effects would be seen in humans.

One study did find that vitamin B12 supplementation reduced anxiety in a group of people with anxiety disorders. However, this study was small and more research is needed to confirm these findings.

Do note, however, that multivitamins can cause more harm than good if they are not taken as directed. Overdosing on vitamins can lead to serious health complications.

For example, taking too much vitamin C can cause kidney stones.

Taking too much vitamin A can cause liver damage.

Taking too much vitamin D can cause calcium deposits in the arteries.

Vitamin B12 supplements can cause anxiety if taken in large doses.


Can b12 supplements cause anxiety? It's important to remember that everyone is different and will react to supplements differently. If you're considering taking a B12 supplement, it's always best to speak with your doctor first.

However, if you are deficient in B12 and are experiencing anxiety as a result, taking a supplement may help alleviate your symptoms.

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