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How Do Vitamin B12 Injections Work?

Vitamin B12 is a vital component in ensuring we function properly in our day to day lives. It helps us stay energetic, protects us against a number of health issues.Studies have even suggested that it can improve your memory and overall brain function.

Why is an injection effective?

An injection is one of the most effective ways to get B12 and is typically used for those who might not benefit from tablets, liquids or capsule supplements for any reason. They are typically injected into a muscle. They can be administered whether you are pregnant or breastfeeding, your diet and if you have any existing medical conditions. As Vitamin B12 is also water-soluble, any excess of the vitamin that your body doesn’t need or have the capacity for will pass through and remove any risk of overdose.

Getting the right balance of vitamins and nutrients in your diet can feel like a constant battle. B12 can be particularly difficult for those who don’t or can’t eat certain foods such as meat, shellfish, eggs and dairy. With around 15% of people failing to get the right levels of Vitamin B12 through their diet alone and with the body unable to produce any for itself, supplements and injections have become a common solution.

What are the signs of B12 deficiency?

VITAMIN B12 OR FOLATE DEFICIENCY ANAEMIA NHS UK

Any person with the signs or symptoms of a B12 deficiency should pay a visit to their doctor, but an injection may still provide them with benefits. Symptoms include:

• Fatigue and Lethargy
• Depression
• Irritability
• Headaches
• Difficulty with balance
• Decreased Cognitive Function
• Constipation
• Sore or Swollen Tongue
• Palpitations
• Mouth Ulcers
• Pins and Needles
• Changes to vision

People With Gastrointestinal Issues

If you’re suffering from any gastrointestinal disorders, you may be at a higher risk of Vitamin B12 deficiency. This is because issues with regular function of the gastrointestinal tract can prevent the proper release and absorption of the vitamin which causes deficiency. Injections are particularly good in these cases, as they bypass the tract for higher absorption rates than with food or oral supplements.

Adults over the age of 65

Due to a number of common issues associated with ageing, including the reduced production of stomach acid, people over the age of 65 may be more prone to a B12 deficiency. For this reason, people in this age group are often recommended to either take supplements, eat fortified foods or get regular injections.

Vegetarians and Vegans 

Vitamin B12 isn’t produced by our bodies despite being one of the most important nutrients needed for everyday function. However, it can be found in foods like fish, eggs, meat and dairy products. For this reason, those eating a vegetarian or a vegan diet are more prone to B12 deficiency. Injections are particularly beneficial for those who are pregnant, who may follow a vegetarian or vegan diet, as it can more accurately ensure that both mum and baby are getting the right volume that they need.

How can B12 Injection help?

Even if you don’t suffer from a deficiency, a B12 boost can still provide a number of benefits, from reducing the risk of deficiency-related conditions to improving brain function, bone health and giving you an overall energy boost:

Reduced risk of associated complications

Even if you aren’t showing pressing signs of a B12 deficiency, many of us still aren’t getting the right volume every day, particularly if we’re sick, pregnant or breastfeeding. Vitamin B12 shots can help to prevent the associated complications of deficiency, including heart disease, coordination problems, vision loss, infertility, neurocognitive disorders and peripheral neuropathy. Some of these conditions can be solved with an injection, but we can discuss this with you on a case-by-case basis.

Higher Level Of Absorption

When injected into the body, Vitamin B12 can bypass the gastrointestinal tract and go directly where it’s needed – for this reason, a shot can be a better choice than oral supplements for a higher level of assimilation. This is particularly beneficial for adults over 65 and those with problems or previous surgery in the digestive tract.

May Help Brain Function

While B12 can’t necessarily improve your brain function on its own, it can help to prevent the loss of neurons associated with memory reduction. Some studies suggest that it can even slow down the development of dementia and Alzheimer’s Disease.

It has also been suggested that B12 deficiency could be a cause of poor memory on a shorter-term basis, which may be helped by a B12 injection or supplement.

Vitamin B12 prevents the loss of neurons in the brain, helping to improve brain function and prevent memory reduction.

May Reduce Depression Risk

Studies into depression have suggested that low B12 can be a  cause of a depressed mood. B12 is a key player in the production of the mood-regulating chemical serotonin and when your body is lacking the vitamin, production can decrease. While B12 injections can’t cure depression on their own, they have been known to relieve or reduce some of the symptoms and can also be used to reduce the risk of severe cases of depression.

May Promote Bone Health

While a B12 shot won’t immediately solve any bone-related issues you may have, the ongoing maintenance of a healthy level may help to promote your bone health. Those suffering from B12 deficiency have been known to have lower than normal bone mineral density, which can lead to osteoporosis over time. 



May Give An Energy Boost

All B vitamins, not just B12, play an important part in how your body produces energy. A lack of B12 in the body can lead to fatigue and tiredness and for this reason, those of us with a deficiency could see an energy boost after a Vitamin B12 injection

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