Vitamin deficiency symptoms: Three common signs you lack vitamin B12

Vitamin B12 is a common condition that could develop with neurological, psychiatric and haematological disorders. When a person has constant fatigue and lethargy it could be an early warning sign of vitamin B12 deficiency. Some people develop lightheadedness or a loss of appetite and these tend to be the warning signs that it could be more serious.

Three main symptoms of vitamin B12 deficiency:

Having a pale yellow tinge to the skin

Jaundice is is a symptom vitamin B12 deficiency. When you are not getting enough vitamin B12 a person is getting less efficient large cells that are not doing their job of carrying oxygen and oxygenating the blood and this leads to paleness.


Serotonin is a neurotransmitter that keeps the brain and mood functioning correctly.

When you have vitamin B12 deficiency this could lead to depression. Vitamin B12 improves neurotransmitter production and communication between nerves, so a shortage in B12 could also mean a shortage in serotonin.

Pins and needles

Vitamin B12 helps make myelin which is the protective covering for nerves. Without it, the nerves get damaged since they are being properly formed.

Vitamin B12 is especially important in producing DNA and maintaining healthy nerve and blood cells.

One way it protects blood cells is by preventing megaloblastic anaemia, a condition that reduces the amount of oxygen your red blood cells can carry.

Potential causes of vitamin B 12 include:

  • Certain conditions affecting the stomach and intestines can prevent the absorption of enough vitamin B12.
  • Some types of medicine can reduce the stock of body’s B12 supply

The recommended daily amount of B12 is 2.4 msg and most people consume that much naturally by eating healthy amounts of protein.

The NHS said: “See a GP if you’re experiencing symptoms of vitamin B12 or folate deficiency anaemia.

“These conditions can often be diagnosed based on your symptoms and the results of a blood test. It’s important for vitamin B12 or folate deficiency anaemia to be diagnosed and treated as soon as possible.

Although many of the symptoms improve with treatment, some problems caused by the condition can be irreversible if left untreated.

“The longer the condition goes untreated, the higher the chance of permanent damage.”

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