Why is Vitamin B12 So Important? – The Enzymatic Generator


One of the much-discussed vitamins will be our topic for today. And by that, I mean vitamin B12, which completes our team of essential players in the vitamin b-complex-family. Like other vitamins of the vitamin B complex, it also plays an important role in our metabolism. Now we will discover the most important aspects of cobalamin, which is the known chemical name for vitamin B12. And we will find an answer to the question “Why is Vitamin B12 so Important? – The Enzymatic Generator”. And moreover, we will have a look on possible sources for this necessary vitamin.

Why is Vitamin B12 like an Enzymatic Generator?citroen b12

As you may have read the other blog posts about the essential vitamins of the vitamin B group, you surely have noticed, that they all play an important role in our metabolism. And this is also not different for vitamin B12.

Although we only need a small amount of vitamin B12 or cobalamin, it fulfills two essential tasks in our body. Firstly it is there for the formation of new cells and genetic material and secondly, it supports the proper function of our nerve system.

These two tasks are achieved by the function of vitamin B12 as a coenzyme in enzymatic reactions. There it serves as a generator for new organic material. So this process can be compared to the motor of a car, which is there to supply the energy to the wheels in order to make the car moving forward. For us, it is just the same. Vitamin B12 is there to supply our body with the foundation to build new cell material as well as material for our nerve cells. That gives us the possibility to move our body and to do the things we want to do at ease.

So if we want to be in good health with a proper cell formation, we need to have a look on our vitamin B12 level. And that is not only the case for vegetarians or vegans, but also for people consuming animal products. The reason for that is, that you may lack in absorbing enough vitamin B12 through your gut. We will discuss this issue later in this article. So stay tuned and take the time to educate yourself about this amazing and essential vitamin.


What is Vitamin B12?

Vitamin B12 is the eighth and last vitamin of the essential vitamins in the vitamin-b-complex, which we have to get through our nutrition.

It is water-soluble, works as a coenzyme and comes with a central cobalt atom. Therefore it is an organo-metallic compound and got its chemical name cobalamin from. It exist two biologically active forms, namely adenosylcobalamin and methylcobalamin. The common exact chemical name cyanocobalamin represents actually the inactive synthetical form.


What is the demand of Vitamin B12?

Depending on the age, health and lifestyle the daily demand for an average and healthy adult for the essential vitamin B12 is

2,5 micrograms (μg) per day.


Where can you get Vitamin B12 from (Top foods)?


Here are the Top foods, which are rich in vitamin B12:

1. Chlorella (up to 100 μg/100g)algae

2. Fish and Meat (up to 10 μg/100g)

3. Cheese and eggs (up to 3 μg/100g)



cheeseTip: It is not yet clear, whether the algae Nori (up to 15 μg/100g) is a good source for vitamin B12. In order to not get B12-analogues,
it is recommended to take a supplementation instead of plant based vitamin B12 sources.



What are the functions and benefits of Vitamin B12?

In the beginning of this blog post, we have discussed the two important tasks of vitamin B12 in our body, namely the formation of new cells and genetic material on the one side and its support within the nerve system by helping to produce new nerve cells on the other side.

Cell formation and function for our nerve system

In our metabolism vitamin B12 is there to form new cells by supporting cell division. Moreover, it is there to promote the formation of new blood cells, new cell membranes, hormones, neurotransmitters and myelin sheath, which is the hull of the nerve fibre. And finally, vitamin B12 is necessary to build new genetic material, which is essential for the DNA synthesis.

Function as a coenzyme

Vitamin B12 only participates in two enzymatic reactions. The first reaction serves for the process of building methionine. Is this process not complete, then there is the danger that high amounts of homocysteine will be built, which has the potential to damage the blood vessels and therefore promote arteriosclerosis.
The second reaction is the function of vitamin B12 to participate in the citrate cycle, which is a cycle to serve us with energy by the oxidative degradation of organic material. When there is not enough vitamin B12 present, then an intermediate product, namely methylmalonic acid, will be formed in high amounts. It has the potential to damage parts of our nerve cells, which can cause disorders in our motor skills.


Vitamin B12 also works as a detoxifier. This can be seen by its ability to reduce the amount of homocysteine and methylmalonic acid, which are potentially toxic for us. Moreover, it has the ability to bind the toxic compound cyanide and forms cyanocobalamin. For example cyanide can develop within the burning of plastic. Vitamin B12 is also able to detoxify nitrogen monoxide as it forms nitrosocobalamin. Nitrogen monoxide is irritating to mucous membranes and can have a negative effect on hemoglobin, the red blood pigment.


What deficiency symptoms of Vitamin B12 exist?

A hypovitaminosis of vitamin B12 is possible and not so seldom. Some risk groups are people with an insufficient nutrition or people with an inability to absorb vitamin B12 due to a missing enzyme, called the intrinsic factor. The symptoms can be as followed:

  • pernicious anemia (blood poorness due to a lack of vitamin B12)
  • funicular myelosis (damage in the central nerve system)
  • insensitivity in hands and feet
  • weakness
  • psychosis
  • lack of concentration


What overdose symptoms of Vitamin B12 exist?

A hypervitaminosis of vitamin B12 is possible through supplementation by injection. Seldom this results in an allergic reaction or acne.


What else may you have to consider about Vitamin B12? 

Value in our body

Vitamin B12 is accumulated in the liver and in the kidneys. The liver can store up to 2000 – 5000 μg of vitamin B12. Its half-life period is about 450 – 750 days.


Antagonists and Advice

Vitamin B9 (folic acid), vitamin B7 (biotin) and vitamin B12 (cobalamin) are dependent on each other.

Discovery and Use

Vitamin B12 was discovered in 1926 as the anti-pernicious factor (pernicious from the French word “pernicieux”, which means harmful). In 1948 it was first possible to isolate the crystalline form of cobalamin.


The word cobalamin comes from the wordcombination “cobal(t) + (vit)amin”.



As we can see vitamin B12 is such an interesting and amazing essential vitamin for us and for our protein metabolism. It does not only support us with the formation of new cells, may it be blood or nerve cells, but it also helps our nerve system to function properly as it works simultaneously as a detoxifier. Some algae, such as chlorella and maybe nori and animal products, such as fish, meat, eggs and cheese are good sources for your daily amount of vitamin B12.

Let us know what do you think about this topic? What was interesting here for you? What else do you know about cobalamin? Please leave a comment below.

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