Understanding B Vitamin Deficiency: Causes and Symptoms

B vitamin deficiency occurs when the body lacks essential B vitamins, impacting various bodily functions like energy production and nerve health.
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Vitamin B Complex | Nutritional Deficiencies | Nerve Health | Vitamin B Insufficiency | B Complex Vitamins
Prepared by Lee Cheng, reviewed by Jane Cox

B Vitamin Deficiency FAQ


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What is a B vitamin deficiency?

The B vitamins are a group of eight nutrients, each with unique roles in keeping the body healthy. They’re especially important for maintaining cell health and keeping you energized. The symptoms of a vitamin B deficiency vary depending on which B vitamin you’re deficient in.

What is vitamin B9 deficiency?

Folic acid is the synthetic form, often found in fortified, processed foods. Like most B vitamins, B9 fosters the growth of red blood cells. It also reduces the risk of birth defects when pregnant women consume it. Vitamin B9 deficiency is rare in the United States, but it does occur.

What is vitamin B1 & B2 deficiency?

Vitamin B1 deficiency is rare, and vitamin B2 deficiency is very rare, in the United States. This is due to the fact that many foods, such as milk and whole-grain cereals, are fortified with these vitamins. It can become an issue with people who misuse alcohol, however, presenting symptoms such as confusion and cracks along the sides of the mouth.

What causes vitamin B12 deficiency?

There are a number of problems that can lead to a vitamin B12 or folate deficiency. pernicious anaemia – where your immune system attacks healthy cells in your stomach, preventing your body absorbing vitamin B12 from the food you eat; this is the most common cause of vitamin B12 deficiency in the UK

What are the symptoms of vitamin B12 deficiency?

Vitamin B12 deficiency can also cause symptoms that affect your brain and nervous system (neurological symptoms), including: psychological problems, which can range from mild depression or anxiety, to confusion and dementia See a GP if you're experiencing symptoms of vitamin B12 or folate deficiency anaemia.

B Vitamin Deficiency References

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