How long to recover from vitamin B12 deficiency

How long does it take to recover from vitamin B12 deficiency?

If you have been diagnosed with vitamin B12 deficiency, you may be wondering how long it will take you to recover from such a deficiency.

Your body requires a variety of vitamins to function effectively. Your body may react poorly if you lack a particular vitamin. It is very common to have a vitamin B12 deficiency. Vitamin B12 contributes significantly to many biological processes. People who are older and don’t eat foods high in vitamins are more likely to have this deficiency.

This article gives you information on what a vitamin B12 deficiency is, what it looks like, and what the recovery process takes if you suspect you may be lacking in this vitamin or if anything about your body seems weird and you aren’t sure why.

Vitamin B12 deficiency

Cobalamin, often known as vitamin B12, is a vital vitamin that your body cannot make on its own. Certain animal products contain it naturally, but it is also frequently added to foods, consumed as an oral supplement, or given by injection.

Your body needs it as a necessary ingredient for functions like DNA synthesis, energy production, and central nervous system health.

According to studies, the percentage of Americans and Britons over 60 who are vitamin D deficient may reach up to 20%. Older persons are more likely to have deficiencies because their bodies’ capacity to absorb B12 from food decreases with age. However, this does not rule out the possibility of B12 deficiency developing in children, young adults, pregnant women, or nursing mothers.

Causes of Vitamin B12 deficiency

An increase in bacteria

Some patients experience vitamin B12 insufficiency as a result of illnesses like diabetes, scleroderma, strictures, and diverticula that restrict the passage of food through the intestines.

The top portion of the small intestine can become overgrown with intestinal bacteria because food passes more slowly through the digestive tract. Instead of allowing vitamin B12 to be absorbed by the body, these bacteria take it.

Lack of an intrinsic factor

A protein called intrinsic factor is created by cells in the stomach lining. Vitamin B12 is attached to an intrinsic factor, which transports it to the intestines where it is absorbed. Your body cannot adequately absorb vitamin B12 without intrinsic factors.

Atrophic gastritis, a weakening of the stomach lining that is more common in older persons, is frequently linked to the absence of intrinsic factors. Reduced amounts of intrinsic factors can be caused by aging or inherited conditions.

Stomach removal or destruction

Surgery to remove all or a portion of the stomach can result in vitamin B12 deficiency. A vitamin B12 deficiency can result from weight-related stomach procedures including gastric bypass and gastrectomy.

Nutritional deficiencies

Because vitamin B12 is most frequently found in animal products, vegans are at risk of developing a vitamin B12 deficiency.

Additionally, because the body is not absorbing enough vitamin B12, those who battle bulimia or anorexia nervosa may have vitamin B12 insufficiency.

Symptoms of vitamin B12 deficiency


B12 insufficiency can induce neurological side effects, such as headaches because it has an impact on your nervous system. In fact, both adults and children who are B12 deficient report headaches as one of their most frequent symptoms.


You might experience weariness if your B12 levels are low or inadequate. Oxygen delivery may be hampered by the drop in normal red blood cell synthesis brought on by vitamin B12 deficiency.

When your body doesn’t produce enough red blood cells, you’ll probably start to experience signs of weakness and exhaustion. It’s crucial to understand that even when your B12 levels are regarded as normal or perhaps borderline low, you might still experience fatigue and other symptoms linked to a B12 shortage.

Pale or yellow skin

A B12 shortage can also be indicated by pale or yellow skin. Your skin may appear pale if you have anemia caused by a B12 shortage because your body isn’t producing enough mature, healthy red blood cells.

This condition is similar to iron deficiency anemia. Jaundice, a disorder that causes your skin and the whites of your eyes to turn yellow, can also be brought on by a B12 shortage.

High levels of bilirubin, a waste product produced when your body breaks down red blood cells, are what give the hue.

Digestive disorders

In addition to these gastrointestinal symptoms, a B12 shortage can also result in diarrhea, nausea, constipation, bloating, and gas. Both adults and children may be impacted by these problems.

Though many of these symptoms are non-specific and may have other causes, keep this in mind. For instance, diarrhea may be caused by illnesses, drugs, and food intolerances.

Depression Signs

Your mental health may be affected by the effects a vitamin B12 shortage has on your central nervous system. Homocysteine levels that are too high can increase oxidative stress, DNA damage, and cell death in the body, which can lead to depression.

Low or insufficient B12 levels can cause additional mental illnesses, such as mood disorders and psychosis, in addition to depressive symptoms.

Concentration issues and mental impairment

Another negative effect that a vitamin B12 shortage can have on your nervous system is that those with low or inadequate B12 levels may experience mental fogginess and struggle to focus and finish tasks.

However, research indicates that B12 supplementation helps ameliorate mental impairment caused by low B12 levels.

Mouth and tongue pain and inflammation

Glossitis, a condition that results in an inflamed, painful tongue, is brought on by a vitamin B12 deficiency.

Glossitis can also accompany stomatitis, which results in ulcers and inflammation in the mouth, in patients with this deficit.

How long does it take to recover from vitamin B12 deficiency?

You need to get the right care if you have any of these signs or if a vitamin B12 deficiency has been identified. It might be too late to rely on vitamin B12-rich foods or oral supplements if your body already has a significant vitamin B12 deficiency.

Getting a vitamin B12 shot is the best and most effective way to give your body the vitamin and attempt to get your levels back to normal. You will start to feel better or begin to recover from a vitamin B12 deficiency 24 to 72 hours after receiving a vitamin B12 injection.

Before you fully recover from the vitamin deficiency, it may take up to 6 to 12 months, but without the shot, it would take much longer.

For those who have problems effectively absorbing vitamins from diet or supplements, vitamin B12 injections are also advised. The most effective option is a vitamin B12 injection since it allows the vitamins to enter the bloodstream without ever passing through the digestive system.


In order to treat this illness, vitamin B12 deficiency must be filled. For those who cannot absorb B12, routine injections are required. For the first week after receiving injections, a patient with severe symptoms might have five to seven shots to replenish the body’s stores of this vitamin.

Within 48 to 72 hours, there is typically a reaction, including rapid synthesis of new red blood cells. B12 injections will be required every one to three months once B12 reserves restore to normal levels to avoid the recurrence of symptoms.

A well-balanced diet that includes the other elements (folic acid, iron, and vitamin C) necessary to form healthy blood cells should be continued by individuals who are unable to absorb vitamin B12. Instead of getting injections, people can occasionally take large doses of oral B12 to offer a replacement, but a doctor should constantly monitor this.

Treatment with oral antibiotics, such as tetracycline (available under numerous brand names), may reduce bacterial overgrowth in persons whose vitamin B12 shortage is attributable to an excess of intestinal bacteria and restore normal vitamin B12 absorption.

The easiest to correct is vitamin B12 insufficiency brought on by inadequate food intake. By consuming meals high in vitamin B12 and taking oral vitamin B12 supplements, the disease can be cured.

Blood transfusions could be required for the first few days before the vitamin B12 injections start to function if the anemia is severe and the red blood cell count is very low.


Vegans should consume enough vitamin B12 supplements to make up for the deficit in their diet in order to prevent vitamin B12 insufficiency.

The disease cannot be avoided in those who cannot absorb B12. However, once it is identified, regular B12 injections will stop the recurrence of symptoms.


A deficit in vitamins in your diet or genetic diseases might result in vitamin B12 insufficiency. Additionally, this deficiency can result in a number of symptoms, such as weariness, headaches, neck discomfort, poor mental health, pale or yellow complexion, mental impairment, and soreness and tongue swelling.

The best option to restore your levels to normal if you have any of the aforementioned symptoms or have been identified as having a vitamin B12 deficiency is with a vitamin B shot. With such a treatment, patients can begin to recover from vitamin B12 deficiency in about 24 to 72 hours.


Michael Sarfo
Content Creator at Wapomu

Michael Sarfo is a graduate of the University of Ghana, Legon. He is a content creator for and a writer for Wapomu

Dr. Ehoneah Obed is a registered pharmacist and a member of the Pharmaceutical Society of Ghana. He has a Doctor of Pharmacy degree from Kwame Nkrumah University of Science and Technology and has experience working in a Tertiary hospital as well as various community pharmacies. He is also a software engineer interested in healthcare technologies.

His love for helping others motivates him to create content on an array of topics mostly relating to the health of people and also software engineering content.

He is knowledgeable in digital marketing, content marketing, and a host of other skills that make him versatile enough to uplift any team he joins.

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