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Mohammed Al Sheikh

I began my journey with MedLabs in 1993 with Dr. Hassib who shared with us his great ambitions and assured us we would grow to become a leading medical laboratories company one day. My experience of witnessing MedLabs grow from its humble beginnings as a struggling ‘group practice’, going against the trend of the one-man-show business model that prevailed at the time, was unique. The fact that a group of laboratory consultants and specialists from different fields of laboratory medicine were willing to work together and cooperate to become a unified, systematized institution is something that deserves to be celebrated. I consider myself lucky to have worked with the founders of MedLabs from the start and to still be with MedLabs as a partner. Although I worked hard on myself, MedLabs through its’ commitment to continuous education and guidance to find my inner and outer callings, helped me live out my ambitions and become who I am today

Vitamin B12 Deficiency: Symptoms, Causes, and Detection

Vitamin B12 is an essential vitamin that the body needs to make healthy red blood cells, support normal nerve function, and help produce DNA. When the body does not have enough vitamin B12, it can lead to vitamin B12 deficiency, which may cause anemia as well as other health problems.

Vitamin B12 deficiency can develop gradually, and its symptoms may be mild at first. Early detection and appropriate treatment can help prevent complications, particularly those affecting the nervous system.

Vitamin B12 Deficiency and Anemia

Anemia does not always mean that a person has iron deficiency. It can have many different causes, including blood loss, chronic diseases, inherited blood disorders, and deficiencies of vitamins such as B12 and folate.

When vitamin B12 levels are low, the body may have difficulty producing normal red blood cells. The cells may become larger than usual and may not function normally. This can result in a type of anemia known as macrocytic anemia.

Importantly, a person can have vitamin B12 deficiency without having anemia or an increased red blood cell size, particularly during the early stages. Therefore, symptoms and risk factors should also be considered when deciding whether testing is needed.

What Causes Vitamin B12 Deficiency?

Vitamin B12 deficiency can occur when a person does not consume enough B12 or when the body cannot absorb it properly.

Common causes include:

Low dietary intake: This can occur in people following a strict vegetarian or vegan diet who do not consume enough B12-fortified foods or supplements.

  • Problems with absorption: Certain stomach or intestinal conditions can prevent the body from absorbing enough vitamin B12
  • Autoimmune conditions: Some people develop an autoimmune condition that affects the stomach and reduces the body’s ability to absorb vitamin B12
  • Stomach or intestinal surgery: Certain surgical procedures can affect the absorption of vitamin B12
  • Certain medications: Long-term use of some medicines, including metformin and proton-pump inhibitors, may increase the risk of vitamin B12 deficiency
  • Older age: The ability to absorb vitamin B12 may decrease with age.
  • Gastrointestinal diseases: Conditions such as Crohn’s disease can affect the absorption of vitamin B12
  • Nitrous oxide exposure: Repeated or significant exposure to nitrous oxide can interfere with the body’s use of vitamin B12

What Are the Symptoms of Vitamin B12 Deficiency?

Vitamin B12 deficiency can affect different parts of the body. Symptoms vary from person to person and may develop slowly.

Common symptoms include:

  • Persistent tiredness or fatigue
  • Lack of energy
  • General weakness
  • Pale skin
  • Dizziness or lightheadedness
  • Shortness of breath, particularly with physical activity
  • Headaches
  • Difficulty concentrating
  • A fast heartbeat or feeling of palpitations

Nerve and Brain-Related Symptoms

Because vitamin B12 is important for healthy nerve function, deficiency may also cause:

  • Numbness or tingling, particularly in the hands and feet
  • Problems with balance or walking
  • Difficulty concentrating or remembering
  • Changes in mood
  • Confusion in more severe cases

These symptoms can sometimes occur even when a person does not have anemia. For this reason, persistent neurological symptoms should not be ignored.

Mouth and Tongue Changes

Some people with vitamin B12 deficiency may develop:

  • A sore or swollen tongue
  • A smooth, red tongue, known as glossitis
  • Mouth ulcers

Who Is More Likely to Develop Vitamin B12 Deficiency?

Some people have a higher risk of developing vitamin B12 deficiency, including:

  • People following a strict vegetarian or vegan diet without adequate B12 supplementation or fortified foods
  • Older adults
  • People who have had certain stomach or intestinal surgeries
  • People with conditions affecting the stomach or intestines
  • People with Crohn’s disease or other conditions that affect nutrient absorption
  • People with certain autoimmune conditions
  • People taking medications such as metformin or long-term acid-reducing medications
  • People with significant or repeated exposure to nitrous oxide

How Is Vitamin B12 Deficiency Diagnosed?

Diagnosis usually starts with a discussion of symptoms, diet, medications, medical history, and other possible risk factors.

Laboratory tests can then help determine whether vitamin B12 deficiency is present.

Complete Blood Count (CBC)

A CBC measures different types of blood cells and may show:

  • Low hemoglobin, indicating anemia
  • Larger-than-normal red blood cells, measured as an increased MCV

However, normal CBC does not always rule out vitamin B12 deficiency.

Vitamin B12 Blood Test

A blood test can measure the amount of vitamin B12 in the blood. When the result is unclear, but vitamin B12 deficiency is still suspected, additional tests may be recommended.

Methylmalonic Acid (MMA)

MMA is a blood test that can provide additional information about vitamin B12 status, particularly when the vitamin B12 result is borderline or unclear.

 

Homocysteine

Homocysteine may also increase when vitamin B12 levels are low. However, it can be affected by other conditions, including folate deficiency, so it should be interpreted together with other test results.

Peripheral Blood Smear

A blood smear allows laboratory professionals to examine blood cells under a microscope. In some cases of B12 deficiency, it may show characteristic changes in the size and appearance of red blood cells and white blood cells.

Identifying the Cause

If vitamin B12 deficiency is confirmed, additional testing may be needed to determine why the deficiency has occurred.

For example, when an autoimmune cause is suspected, an intrinsic factor antibody test may be requested.

Why Is Early Detection Important?

Vitamin B12 deficiency can develop slowly, and symptoms may initially be easy to overlook.

Early testing can help identify the deficiency and determine its possible cause. This allows appropriate treatment to begin and may help prevent complications.

This is particularly important when symptoms such as numbness, tingling, balance problems, or changes in concentration or memory are present, because prolonged vitamin B12 deficiency can cause nerve-related problems.

Take the Next Step with MedLabs

If you are experiencing persistent fatigue, weakness, numbness, tingling, or other symptoms that may be related to vitamin B12 deficiency, laboratory testing can help determine whether your vitamin B12 level is within the expected range.

MedLabs offers vitamin B12 and anemia-related laboratory testing to support your healthcare professional in evaluating your symptoms and determining the appropriate next steps.

Remember, laboratory results should always be interpreted together with your symptoms, medical history, and other relevant investigations by a qualified healthcare professional.

This article is intended for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment.

 

Vitamin D Deficiency: Symptoms, Causes, and What to Do Next

Vitamin D Deficiency: Symptoms, Causes, and What to Do Next

Vitamin D deficiency is one of the most common nutrient deficiencies worldwide, and it often develops quietly. Because symptoms are vague and easily mistaken for everyday tiredness, many people live with low levels for years without knowing it. A simple blood test can catch it early, before it affects bone strength, energy, or long-term health.

What Is Vitamin D Deficiency?

Vitamin D is a fat-soluble vitamin the body needs to absorb calcium, support immune function, and maintain healthy bones and muscles. Unlike most vitamins, the body can produce it when skin is exposed to sunlight, though it is also found in a small number of foods and in supplements. Deficiency occurs when circulating Vitamin D levels in the blood fall below what the body needs for normal function. This becomes more likely with age, limited sun exposure, or increased demand by the body.

What Causes Vitamin D Deficiency?

There is no single cause. Several factors can contribute, often together:

  • Limited sun exposure: indoor lifestyles, desk-based jobs, and regular sunscreen use all reduce the skin’s natural vitamin D production.
  • Skin tone: higher melanin levels reduce how efficiently skin converts sunlight into vitamin D.
  • Age: skin becomes less efficient at producing vitamin D as we get older.
  • Body weight: vitamin D can be stored in fat tissue, which can lower the amount circulating in the blood.
  • Diet: few foods naturally contain vitamin D, and low intake of fatty fish, egg yolks, and fortified products can contribute.
  • Certain health conditions: Crohn’s disease, coeliac disease, and kidney or liver disorders can affect how the body absorbs or activates vitamin D.
  • Clothing and lifestyle habits: covering clothing and limited time outdoors can significantly reduce sun exposure.

Despite abundant year-round sunshine, deficiency rates remain surprisingly high across the Middle East, largely due to lifestyle habits, clothing, and time spent indoors that limit direct sun exposure.

Common Symptoms

Symptoms are often subtle and can be easy to overlook. They may include:

  • Persistent fatigue and low energy
  • Bone or lower back pain
  • Muscle weakness, aches, or cramps
  • Frequent colds or infections
  • Low mood
  • Hair thinning or hair loss
  • Slow wound healing

Many people with vitamin D deficiency have no noticeable symptoms at all. Because the signs are so easy to dismiss, or absent altogether, blood testing rather than guesswork is the only reliable way to know your levels.

How Is Vitamin D Deficiency Diagnosed?

Vitamin D comes in two forms; D2 and D3. Both raise overall vitamin D levels, but research shows that Vitamin D3 is more effective at raising and maintaining blood levels over time. A simple blood test, called 25-hydroxyvitamin D or 25(OH)D, measures the amount of vitamin D3 circulating in the blood. It usually requires only a quick blood draw, with no special preparation needed.

Results are generally categorised as follows:

  • Deficient: below 20 ng/mL
  • Insufficient: 20–29 ng/mL
  • Sufficient: 30–100 ng/mL
  • Potentially toxic: above 100 ng/mL

Your doctor will interpret your result alongside your symptoms, age, risk factors, and overall health.

The Role of Laboratory Testing

Laboratory testing is the only reliable way to confirm a vitamin D deficiency, since symptoms alone are not specific enough for diagnosis. A blood test also allows you and your doctor to track how levels respond to sunlight, diet, or supplementation over time.

MedLabs offers a dedicated Vitamin D test to measure your levels directly. For a broader picture of nutrient status, MedLabs’ NutriPATH analysis assesses micronutrient deficiencies, gut imbalances, and metabolic gaps, giving you and your doctor more information to plan next steps.

How Is Vitamin D Deficiency Treated?

Treatment usually starts with vitamin D3 supplementation. Dosage and duration depend on how low your levels are and should be guided by a doctor, since taking too much vitamin D over a long period can also cause harm.

Alongside supplementation, doctors may recommend safe sun exposure, dietary changes, and addressing underlying conditions that affect absorption. Retesting after a few months confirms whether levels have returned to a healthy range.

Living Well and Preventing Deficiency

  • Get regular, safe sun exposure when possible
  • Include vitamin D-rich foods such as fatty fish, egg yolks, and fortified products
  • Take supplements as advised by your doctor
  • Retest periodically, especially if you’re in a high-risk group
  • Maintain a healthy weight
  • Speak to your doctor if you have a condition that affects nutrient absorption

When to See a Doctor

Consult a doctor if you experience:

  • Persistent, unexplained fatigue
  • Ongoing bone, joint, or muscle pain
  • Frequent infections or slow healing
  • Risk factors such as limited sun exposure, darker skin, obesity, or a condition affecting nutrient absorption

Take the Next Step With MedLabs

Vitamin D deficiency is common, often silent, and easy to check for. A simple blood test can tell you where you stand and guide the right next steps with your doctor.

Book your Vitamin D test | Find a MedLabs branch near you