Low B12 ~ Health Issues

What seems like a disease could in fact be a health issue related to vitamin B12 Deficiency. Yes, Really. It’s important to know that low vitamin B12 levels impact nerves and/or blood.

How does low B12 affect nerves?

There are over a billion nerves in your body. The image shows only the largest. For each of your nerves to be healthy, from the largest to the tiniest, you need healthy vitamin B12 levels.

Graphic: The Nervous System
There are over a billion nerves in the human body

Low vitamin B12 can cause burning pain in peripheral nerves like those in your thighs, numbness due to impaired nerves in your feet, blurry vision by way of less-than-healthy optic nerves, loss of balance or inability to find the right word because your cerebellum is starved for B12, and so forth.

This clever, interactive map of nerves in the human body gives medical names to the main nerves.

B12 and your blood system

B12 and the nervous system isn’t all there is to it. Vitamin B12 is equally important to your circulatory system.

Circulatory system shown in a hand
Circulatory System

For over a century “modern medicine” ignored neurological symptoms and identified low vitamin B12 only if there was anemia, that is, a pathological or extreme, abnormal lack in the oxygen-carrying component of blood.
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Many of the most common symptoms of low vitamin B12 occur because of the effect of low B12 on blood.


photo of red blood cells
Healthy red blood cells need B12

B12 and red blood cells ~ Without enough vitamin B12, your body has a problem making new red blood cells. Instead of your blood cells maturing and dividing, they enlarge but don’t divide. How can this happen? Read More.

Digital thermography showing numbness

Numbness ~ Many people find my site by searching “numb” or “numbness.” Some search with the specific question, “Can you get rid of numb feet?” I answer that with three things I know about numbness. You may be surprised to learn that numbness is likely to result from low B12 levels affecting your blood. Read More.

Other Specific Symptoms of Low B12

Microscopic view of pollen
Pollen, one cause of allergies

Allergies and B12 ~ Reflecting on the beginning of my allergies, I can see they were linked to stress. While my grandfather was sure I’d grow out of my allergies by the time I got married, in fact my allergies didn’t subside and finally end until I experimented with foods and vitamins. Read More.

h.pylori and diarrhea

Diarrhea, B12 Deficiency and h.pylori ~ You may not know that diarrhea is a persistent, common problem for many people with low vitamin B12. While you may be familiar with diarrhea, you may know little or nothing about h.pylori which can cause low vitamin B12. Read More.


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Jarrow Methyl B12

High Homocysteine ~

Homocysteine, discovered in 1932, is an amino acid, but not the good, building block kind.

Graphic: High Homocysteine is linked to cardiovascular disease, stroke, osteoporosis, Alzheimer's, Depression, and even some birth defects in babies whose mothers had a high homocysteine level during pregnancy
High Homocysteine is linked to heart attacks, stroke, Alzheimer’s, Depression, even some birth defects

A combination of folic acid and vitamin B12 is highly effective in lowering homocysteine levels. Read More.

Common Symptoms of Low Vitamin B12


Pins and Needles

Sleep Problems

Stress Felt as Anxiety

Suicidal Feelings

Weight Gain

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