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Can Vitamin B12 Supplements Boost Energy?

By Apollo Pharmacy, Published on- 22 September 2023, Updated on -25 September 2023

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Vitamin B12 is a crucial nutrient that plays a key role in the body's overall health and vitality. Unfortunately, vitamin B12 deficiency is quite common in India, with estimates suggesting that up to 47% of the Indian population may be deficient in this essential vitamin. To combat vitamin B12 deficiency and its associated symptoms, many individuals turn to B12 supplementation. One popular option is taking vitamin B12 tablets or capsules. These supplements provide a convenient and effective way to ensure adequate intake of this vital nutrient. In this article, we will delve into the benefits of B12 supplementation and learn how it boosts energy and vitality.

What is Vitamin B12 Deficiency?

Vitamin B12 deficiency occurs when the body doesn't get enough vitamin B12 to function properly. Vitamin B12, also known as cobalamin, is a water-soluble vitamin that plays a crucial role in various bodily processes, including the formation of red blood cells, the maintenance of a healthy nervous system, and the synthesis of DNA.

1. Causes of Vitamin B12 Deficiency

Vitamin B12 deficiency can occur for various reasons. It is essential to identify the underlying causes to address the deficiency effectively.

  • Inadequate Intake Through Diet: Vitamin B12 is primarily found in animal products such as meat, eggs, milk, and fish. Vegetarians and vegans are at a higher risk of deficiency.
  • Malabsorption Issues: Certain medical conditions like pernicious anaemia, celiac disease, or Crohn's disease can hinder the absorption of Vitamin B12 from food.
  • Medications Interfering with Absorption: Long-term use of certain medications like proton pump inhibitors or metformin may reduce B12 absorption.

2. Risk factors for the Deficiency

Several risk factors can increase the likelihood of developing a vitamin B12 deficiency.

  • Age: As we age, our ability to absorb Vitamin B12 decreases. This is often due to decreased stomach acid production and reduced production of intrinsic factor, a protein necessary for B12 absorption.
  • Gastrointestinal Surgeries: Procedures like gastric bypass surgery may lead to reduced absorption of Vitamin B12.
  • Chronic Alcoholism: Alcohol interferes with the body's ability to absorb and store Vitamin B12.

3. Symptoms of Vitamin B12 Deficiency

Some of the symptoms of vitamin B12 deficiency are:

  • Fatigue and weakness
  • Numbness or tingling sensation in hands and feet
  • Memory problems
  • Cognitive impairment, such as difficulty concentrating or confusion
  • Depression or mood swings
  • Shortness of breath and lightheadedness

Health Benefits of Vitamin B12 Supplementation

Vitamin B12 supplementation offers a range of health benefits, especially for individuals who have a deficiency or are at risk of deficiency. Some of the health benefits include:

1. Improved Cognitive Function and Mental Health

By ensuring adequate levels of vitamin B12 through supplementation, individuals may experience improved mood and overall mental well-being.

  • Cognitive Function: Vitamin B12 plays a crucial role in maintaining optimal cognitive function and mental health. Research has shown that there is a link between vitamin B12 deficiency and cognitive decline, including memory loss and impaired thinking skills. This is particularly important for older adults, as they are more prone to vitamin B12 deficiency.
  • Mood Regulation: Vitamin B12 is also involved in mood regulation and the prevention of depression. Studies have highlighted the association between low levels of vitamin B12 and an increased risk of depression.

2. Enhanced Metabolism and Weight Management

Vitamin B12 plays a crucial role in the metabolism of fats, proteins, and carbohydrates. It helps convert food into energy, allowing your body to use nutrients more efficiently. By ensuring that your body has sufficient levels of vitamin B12, you can support a healthy metabolism and promote weight loss.

Moreover, research has shown that vitamin B12 supplementation can aid in  weight management when combined with a healthy diet and exercise. This can be particularly beneficial for individuals who are trying to lose weight or maintain a healthy weight.

3. Cardiovascular Health Support

Vitamin B12 tablets aid in cardiovascular heart support and reducing the risk of heart disease through methods such as:

  • Impact on homocysteine levels: When it comes to maintaining a healthy heart, vitamin B12 supplementation can play a crucial role. Research has shown that vitamin B12 has a direct impact on homocysteine levels in the blood. Homocysteine is an amino acid that, when present in high levels, can increase the risk of heart disease and stroke.
  • Benefits of Vitamin B12 on Heart Health: By supplementing with vitamin B12, you can help lower homocysteine levels and reduce the risk of cardiovascular issues. Vitamin B12 works alongside other B vitamins, such as folate and Vitamin B6, to convert homocysteine into methionine, an essential amino acid.
  • Improved Endothelial Function: Additionally, Vitamin B12 supplementation has been linked to improved endothelial function, which is essential for healthy blood vessels. It helps in the production of nitric oxide, a molecule that relaxes and widens blood vessels, improving blood flow and reducing the strain on the heart.

Food Sources Rich in Vitamin B12

Apart from  B12 tablets, Vitamin B12 can be sourced through plant and animal-based products. Here are some  food sources rich in vitamin B12:

1. Plant-based Options for Vegans and Vegetarians

Plant-based diets have gained popularity in recent years due to their numerous health benefits.

  • Fermented Foods: Fermented foods like tempeh, miso, and sauerkraut naturally contain small amounts of vitamin B12. Including these foods in your diet can be a delicious way to boost your vitamin B12 levels.
  • Fortified Plant-based Milk Alternatives: Many plant-based milk alternatives, such as soy milk, almond milk, and oat milk, are fortified with vitamin B12. Check the labels to ensure they contain adequate amounts of this essential nutrient.

Some breakfast cereals are fortified with vitamin B12. Look for cereals that explicitly mention vitamin B12 on the packaging. Nutritional yeast is also a popular ingredient in vegan cooking and has a cheesy flavour. It is often fortified with vitamin B12, making it a convenient way to increase your intake.

2. Animal-based Sources for Non-Vegetarians

If you're a non-vegetarian, you have a wide range of options that are rich in this essential vitamin. Here are some animal-based sources of vitamin B12:

  • Lean Meats: Meats such as chicken, fish and turkey not only provide protein but also contain significant amounts of vitamin B12.
  • Dairy Products: Dairy products such as milk, cheese and  yoghurt are excellent sources of vitamin B12 for non-vegetarians. Incorporating them into your diet can help ensure you're getting the necessary amount of this important nutrient.

When to Consider Vitamin B12 Supplementation

When it comes to considering vitamin B12 supplementation, there are certain groups at a higher risk for deficiency. Vegans, for example, rely solely on plant-based foods and may find it challenging to get enough vitamin B12 from their diet alone.

1. Blood tests to Determine Vitamin B12 levels

To determine if you need vitamin B12 supplementation, blood tests can be done to measure your vitamin B12 levels. These tests can help identify if you have a deficiency or if you're at risk of developing one.

2. Recommended Dosage of Vitamin B12

Supplementation with vitamin B12 can come in different forms, including b12 tablets, capsules, and injections. The recommended dosage may vary depending on your age, health condition, and the severity of your deficiency.

The average recommended dietary allowance for adults is 2.4 mcg, while for children (9-13 years old) it is 1.8 mcg. It's important to consult with a healthcare professional who can guide you in determining the right dosage and form of supplementation for your specific needs.

Precautions and Potential Side Effects

Vitamin B12 tablet is generally safe and well-tolerated when taken within recommended dosage. However, as with any supplement or medication, there are precautions to consider, and some individuals may experience side effects.

1. Possible Interactions with Medications

Vitamin B12 can interact with certain medications, such as metformin (used to treat diabetes) and proton pump inhibitors (used to reduce stomach acid). It is essential to consult with a healthcare professional before starting supplementation if you are taking any medications to avoid any potential adverse effects or reduced efficacy of either the medication or the vitamin.

2. Allergic Reactions and Hypersensitivity

Although rare, some individuals may experience allergic reactions or hypersensitivity to vitamin B12 supplements. Symptoms may include

  • Itching
  • Rashes
  • Swelling
  • Difficulty breathing

If you notice any unusual symptoms after starting supplementation, discontinue use and seek medical attention immediately.


Vitamin B12 is an essential nutrient that plays a key role in maintaining overall health and well-being. Adequate levels of B12 are necessary for the proper functioning of the body, and deficiency can lead to a range of health issues. Fortunately, there are several ways to ensure you are getting enough B12, including through diet and supplementation. To ensure you are reaping the benefits of Vitamin B12 tablets, it is important to prioritise your intake through diet or supplementation. Talk to your healthcare provider to determine the appropriate dosage for you and make sure to choose high-quality supplements from trusted sources. Remember, maintaining optimal nutrition is key to living a healthy and vibrant life.

Explore Vitamin B12 Supplements


Q. How do I know if I have a B12 deficiency?

Common symptoms of B12 deficiency include fatigue, weakness, tingling or numbness in the hands and feet, difficulty concentrating, and mood changes. A blood test can confirm the deficiency.

Q. Are there any risks associated with taking B12 tablets?

B12 supplements are generally safe when taken within the recommended dosage. However, some side effects may include rash, swelling, itching, and difficulty breathing.

Q. How long does it take to see the benefits of B12 supplementation?

The timeframe for experiencing the benefits of B12 supplementation varies from person to person. Some individuals may notice improvements in energy levels within a few days or weeks, while others may take longer.

Q. Can vitamin B12 improve my mood and mental well-being?

Yes, vitamin B12 plays a role in neurotransmitter synthesis and has been linked to improved mood and mental well-being. However, individual responses may vary, and it is important to address any underlying mental health concerns with a healthcare professional.

Q. Can vitamin B12 supplements interact with medications?

Vitamin B12 supplements are generally well-tolerated and do not have significant interactions with most medications. However, they may interact with medications such as metformin and proton pump inhibitors. It is always advisable to consult with your healthcare provider, especially if you are taking any prescription medications.



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