Vitamin B12: Benefits and Deficiency

Many people occasionally feel tired or experience vague symptoms without immediately knowing the cause. Stress or a busy period is often the first explanation that comes to mind, but the role of essential nutrients is frequently overlooked. Vitamin B12 is one of those crucial vitamins that quietly supports many important processes in the body, from your energy metabolism to the normal functioning of your nervous system. It is not always easy to determine whether you are getting enough of this vitamin, especially with today's diverse dietary habits. Understanding how vitamin B12 works and recognising the signs of a possible deficiency can help you make more informed choices about your nutrition and overall health.

Table of Contents

• What exactly does vitamin B12 do for your body?
• How do you recognise a deficiency of this important vitamin?
• Which foods naturally contain the most vitamin B12?
• How do you combine supplements for your hair, skin and nails?
• When do you need additional vitamin supplements to support your immune system?
• How much vitamin D do you need each day alongside vitamin B12?
• What is a healthy vitamin B12 level in your blood?
• How do supplements stay fresh for longer in your kitchen cupboard?
• What is the best time of day to take vitamins?
• What are the benefits of vitamin K for your bone health?
• Frequently Asked Questions about Vitamin B12

Vitamin B12 contributes to normal energy-yielding metabolism.

What exactly does vitamin B12 do for your body?

Vitamin B12, also known as cobalamin, is an essential nutrient that plays a key role in a wide range of bodily processes. It is indispensable for the formation of red blood cells, which transport oxygen throughout your body. In addition, vitamin B12 contributes to the normal functioning of the nervous system and to normal psychological function. When a vitamin B12 deficiency occurs, a variety of symptoms may develop. If you suspect a deficiency, it is advisable to consult your doctor. It is therefore clear that this particular B vitamin does much more than many people realise.

Vitamin B12's contribution to your energy levels

One of the best-known functions of vitamin B12 is the role it plays in normal energy-yielding metabolism. It helps your body release energy from the food you eat. This means that an adequate intake of vitamin B12 contributes to the reduction of tiredness and fatigue, helping support vitality throughout the day. If you notice that your energy levels are lower than usual, it may be worthwhile considering whether you are getting enough vitamin B12. For a structured daily supplement routine, VITBLISS Supplement Cards have been specially developed to make your supplement intake simple and organised. These pharmacist-reviewed cards provide one clearly arranged daily serving. You can find more information at vitbliss.com.

How do you recognise a deficiency of this important vitamin?

A deficiency of cobalamin, as vitamin B12 is also known, can develop gradually and may present itself in different ways. Because the symptoms are often general and can resemble those of other conditions, it is sometimes difficult to identify the underlying cause straight away. For example, you may feel tired, experience tingling sensations in your hands or feet, or notice problems with concentration. These symptoms should be taken seriously, as a long-term deficiency may affect the normal functioning of the nervous system and the formation of red blood cells.

Common signs of a vitamin B12 deficiency

Common signs that may indicate an insufficient intake of cobalamin include persistent fatigue and a lack of energy. Some people may also experience physical symptoms such as glossitis (an inflamed tongue), cracks at the corners of the mouth, or muscle weakness. VITBLISS offers a range of Supplement Cards designed to support different nutritional needs. If you recognise one or more of these symptoms and are concerned about your vitamin B12 status, it is always advisable to consult your doctor. A blood test can determine your vitamin B12 levels and help identify whether a deficiency is present.

Which foods naturally contain the most vitamin B12?

If you are wondering where vitamin B12 naturally occurs in food, it is important to know that this nutrient is found primarily in animal-based products. Good natural sources include meat such as beef and liver, fish including salmon and tuna, as well as dairy products like milk and cheese, and eggs. For vegetarians and especially vegans, obtaining enough vitamin B12 can be more challenging because plant-based foods generally contain little or no active vitamin B12. This makes it especially important to pay close attention to your daily intake.

Understanding vitamin B12 blood values

For people who eat little or no animal products, it is often sensible to consider alternative ways of obtaining sufficient vitamin B12. Fortified foods, such as certain breakfast cereals or plant-based milk alternatives, can provide additional vitamin B12. VITBLISS understands that meeting all your nutritional needs through diet alone is not always easy, particularly if you follow a specific dietary pattern. For this reason, pharmacist-reviewed VITBLISS Supplement Cards have been developed to fit easily into your daily routine. Each card provides a clearly organised daily serving, making supplementation straightforward and consistent.

How do you combine supplements for your hair, skin and nails?

Combining supplements to support your hair, skin and nails can sometimes seem complicated because of the wide variety of products available. It is important to consider how different nutrients work together. Some nutrients support each other's absorption, while others contribute independently to maintaining normal bodily functions. A sensible starting point is ensuring that your body receives the essential nutrients it needs every day before considering additional targeted support that matches your personal situation. For example, VITBLISS offers daily Supplement Cards that focus on supporting energy, bones, joints, and overall vitality, creating a strong nutritional foundation that also contributes to your overall wellbeing and, indirectly, to the condition of your hair, skin and nails.

Vitamin B12 supplementation for specific diets

For those looking for a structured approach, VITBLISS also offers specially developed 50+ Supplement Cards. These pharmacist-reviewed cards focus on supporting energy, bones, joints, immunity, and overall vitality, providing an organised way to manage your daily nutritional intake. The combinations have been designed specifically for the nutritional needs associated with this stage of life, making it easier to establish a consistent supplement routine without having to select multiple individual products.

When do you need additional vitamin supplements to support your immune system?

Your immune system is a complex network that protects your body every day from external influences. Whether supplementation is appropriate depends on your personal circumstances and your usual diet. A healthy, varied, and balanced diet should always remain the foundation. However, vitamin B12 may provide valuable support because it contributes to the normal function of the immune system.

The role of vitamin K in bone health

Supporting your immune system requires a balanced overall approach. Alongside sufficient sleep and regular physical activity, certain nutrients play an important role. A vitamin B12 supplement may be particularly valuable if your diet contains few or no animal products. For this reason, VITBLISS has developed the Energy Card, providing a clearly organised daily serving of nutrients that contribute to the normal function of the immune system. The card has been developed and reviewed by pharmacists, giving you confidence that you are making a well-considered choice.

Learn which symptoms may indicate a vitamin B12 deficiency and when it is advisable to consult a doctor.

How much vitamin D do you need each day alongside vitamin B12?

Alongside vitamin B12, it is important to understand that vitamin D also plays an essential role in maintaining good health. The amount of vitamin D you need depends on several factors, including your age, skin tone, lifestyle, and how much sunlight your skin is exposed to. In general, the recommended daily intake for adults is 10 micrograms of vitamin D. Although vitamin B12 and vitamin D perform different functions within the body, they are both essential nutrients that contribute to normal bodily functions.

Recommended daily intake of vitamin D

For adults aged 50 and over, and for people who receive little sunlight on their skin, a higher daily intake of 20 micrograms of vitamin D is often recommended. This recommendation helps support the maintenance of normal bones, normal muscle function, and the normal function of the immune system, all recognised functions of vitamin D. To simplify your daily routine, VITBLISS offers pharmacist-reviewed Supplement Cards that provide clearly organised daily servings tailored to specific health goals, including combinations containing both vitamin B12 and vitamin D where appropriate.

What is a healthy vitamin B12 level in your blood?

A healthy vitamin B12 blood level can vary between individuals, but in general a value between 145 and 569 picomoles per litre (pmol/L) is commonly used as a reference range. It is important to understand that this is a relatively broad range and that individual needs may differ. Some people may experience symptoms even when their levels fall within the reference range, while others only develop symptoms at considerably lower values. Factors such as age, lifestyle, and medication use may all influence how blood test results should be interpreted. For this reason, it is important not only to look at the laboratory value itself, but also to consider your overall health and any symptoms you may be experiencing.

Specific vitamins for immune support

Maintaining a healthy vitamin B12 status contributes to several normal bodily functions, including normal red blood cell formation, the normal functioning of the nervous system, and normal psychological function. If your blood level is towards the lower end of the healthy range—or below it—it may indicate a deficiency that deserves further investigation.

Only your doctor or another qualified healthcare professional can diagnose a vitamin B12 deficiency based on blood tests together with your medical history and symptoms. They can advise whether dietary changes or supplementation would be appropriate for your individual situation. VITBLISS Supplement Cards can help support your daily nutritional intake, but they should always be considered as a complement to professional medical advice.

How do supplements stay fresh for longer in your kitchen cupboard?

The shelf life of supplements, including vitamin B12, depends largely on how they are stored. Moisture, heat, and light are the main factors that can reduce the stability of active ingredients over time. To preserve the quality of your vitamin B12 and other supplements, it is important to store them in a cool, dry, and dark place. A closed kitchen cupboard or drawer is often an ideal location, provided it is protected from direct sunlight and large temperature fluctuations. Bathrooms and cupboards above cookers are generally less suitable because humidity and temperature change frequently, which may accelerate the breakdown of active ingredients.

Proper storage for supplements supporting hair and skin

It is also important to keep supplements in their original packaging. Most vitamin B12 supplements are supplied either in containers with moisture-absorbing sachets or in blister packs designed to protect the active ingredients. Always close the packaging immediately after use and avoid transferring supplements to alternative containers unless recommended by the manufacturer. Correct storage helps maintain the quality and stability of your supplements until their expiry date, ensuring they continue to provide the intended nutritional support.

What is the best time of day to take vitamins?

The ideal time to take vitamins and minerals depends largely on the type of supplement, although consistency is generally more important than the exact time of day. For many supplements, including most B vitamins such as vitamin B12, taking them with a meal is often recommended. This may improve comfort and reduce the likelihood of stomach irritation. Fat-soluble vitamins—including vitamins A, D, E, and K—should preferably be taken with a meal that contains some fat, as dietary fat supports their absorption. Water-soluble vitamins, such as vitamin C and the B vitamins, can often be taken on an empty stomach, but many people find taking them with food more comfortable.

Taking vitamins with meals for optimal absorption

For many supplements, including vitamin B12, taking them during or shortly after a meal is a practical choice. Choosing a fixed moment that fits naturally into your daily routine—whether that's breakfast, lunch, or dinner—makes it much easier to remember your supplements consistently. A regular routine is one of the most effective ways to support long-term adherence to supplementation.

What are the benefits of vitamin K for your bone health?

Vitamin K plays an important role in maintaining normal bones, although its contribution is often overlooked compared with vitamin D and calcium. Vitamin K helps activate specific proteins involved in bone formation and maintenance. Without adequate vitamin K, these proteins cannot function normally, making vitamin K an important part of overall bone health, particularly as we get older. Ensuring an adequate intake of vitamin K contributes to the maintenance of normal bones as part of a balanced diet.

The best storage conditions for vitamin K supplements

To ensure vitamin K supplements retain their quality, they should be stored under appropriate conditions. A kitchen cupboard is often ideal because it is generally cool, dry, and protected from direct sunlight. Excessive heat, moisture, and exposure to light may gradually reduce the stability of vitamin K and other nutrients. By storing your supplements correctly, you help preserve their quality until the expiry date, allowing you to continue benefiting from their intended nutritional value.

Conclusion: Vitamin B12

You now know that vitamin B12 plays a key role in normal energy-yielding metabolism, the normal functioning of the nervous system, and normal red blood cell formation, and that a deficiency may develop gradually without immediately obvious symptoms. Understanding the signs of a possible deficiency and knowing which foods naturally contain vitamin B12 are important first steps towards making more informed choices about your health.

Whether you follow a plant-based diet or simply want additional nutritional support, establishing a consistent supplement routine can make it easier to maintain an adequate intake of vitamin B12. VITBLISS Supplement Cards, developed and reviewed by pharmacists, have been designed to simplify your daily routine by providing clearly organised daily servings tailored to different health goals.