7 Symptoms of B12 Deficiency That You Should Never Ignore

Nowadays, there are more and more people that suffer from some kind of vitamin deficiency. Vitamin deficiencies occur as a result of various reasons such as certain conditions, poor nutrition, aging, pregnancy, diseases or bariatric surgery. Also, your vitamin intake greatly depends on your age, sex as well as activity level.

These are the most common nutrient deficiencies in the U.S:

  • Calcium
  • Magnesium
  • Iron
  • Iodine
  • Vitamin A
  • Vitamin D
  • Vitamin B12
  • Vitamin B12

Vitamin B12, or cobalamin, is water-soluble and needed for the healthy brain and nerve function, and especially for blood formation. Since we cannot naturally produce it, we need to get it through food on a daily basis. It is contained in animal-based foods only, and the early detection of this deficiency is crucial, as the neurological symptoms it causes are irreversible.

These are the ones who are more prone to B12 deficiency:

  • Vegans and/or vegetarians
  • Pregnant or breastfeeding women
  • People suffering from gastrointestinal issues like anorexia, stomatitis, or chronic diarrhea
  • Bariatric surgery patients
  • Individuals suffering from gastrointestinal disorders like Crohn’s disease, stomach infections, and stomach restrictions

These are the increased risk factors due to B12 Deficiency:

Elevated Homocysteine Levels

This amino acid is formed from the breakdown of protein, and its elevated levels raise the chances of developing various diseases, like Alzheimer’s Disease, heart attack, and stroke.

Megaloblastic Anemia

It occurs when the bone marrow creates unusually large, structurally abnormal, immature red blood cells (megaloblasts), which leads to the reduced count of red blood cells, and reduces oxygen flow to the organs and tissues. The most common symptoms include fatigue, numbness in your extremities, diarrhea, nausea, muscle weakness, and wasting.

Cognitive Disorders

Reduces b12 levels lead to the development of dementia and depression. Moreover, researchers have found that supplementing cannot reverse the damage in dementia sufferers.

Impaired Infant Development

B12 deficiency might affect the physical and cognitive development of the baby, leading to severe abnormalities and impaired brain function.

These are the signs and symptoms of this deficiency:

Constant Fatigue

The reduced b12 levels mean reduced oxygen flow, and this leads to lethargy and fatigue.

Iron Deficiency

B12 helps the absorption of iron, and B12 deficiency is often masked by an iron deficiency. This is a common case in menstruating women.

Pins and Needles

Unexplained numbness, pins and needles, and shock wave-like feelings throughout your body often indicate nerve damage due to the reduced oxygen levels in the cells.

Muscle Weakness

B12 deficiency is often manifested by weakness to perform the everyday tasks.


Severe forgetfulness is another common symptom of B12 deficiency.

Vision Trouble

Blurred vision, spotting, and an extreme light sensitivity often result from the deficiency of this vitamin in the body.


Frequent dizziness episodes and vertigo indicate an issue such as B12 deficiency.

Here are 5 ways to naturally increase B12 levels without supplementation:


You should involve the following dietary sources of B12 into your diet:

  • Meat, especially red meat
  • Eggs
  • Dairy products
  • Shellfish, especially clams and oysters
  • Nori and Tempeh

Proper Calcium Intake

Calcium helps the absorption of this vitamin, so you should make sure you consume more calcium-high foods, like dairy products and green leafy vegetables.


The ingredient of this spice, “piperine”, boosts the bioavailability of vitamin B12, so make sure you add it to your meals.

Cranberry Juice

Researchers have found that cranberries, cranberry juice, and cranberry capsules boost the B12 absorption too.

Limit Alcohol Intake

Excessive alcohol intake reduces the absorption of B12, as it interferes with the ability of the body to produce intrinsic factor. Women should drink up to one, and men should have no more than two drinks daily.

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