What does vitamin B12 actually do in our bodies?

Vitamin B12 does many things in our bodies. It is essential for the formation of our red blood cells, cell metabolism, nerve function and DNA production.

What are symptoms of low B12?

Some of the symptoms of low B12 levels include anemia (found on your blood work), muscle weakness, fatigue, nerve damage, intestinal problems, mood disturbances and there are some links between low B12 levels and dementia. However, studies have been unclear if supplementation will help prevent or treat dementia.  Also, studies have not shown to boost your energy or make you a better athlete unless you have a deficiency. A vitamin B12 deficiency is uncommon in the US.

What are some natural sources of B12?

You can find vitamin B12 mostly in meat sources such as poultry, beef, fish and dairy. You can also find B12 in fortified food sources such as fortified cereals. 

What are side effects of high vitamin B12?

High vitamin B12 levels can result in headaches, nausea, vomiting, diarrhea, fatigue, weakness and tingling sensations in your hands and feet. It can also result in acne and rosacea out breaks. The excess vitamin B12 is excreted in your urine. 

Medications that can affect vitamin B12 absorption: 

Paser (Aminosalicylic acid) Colchicine (for gout)

Metformin (for diabetes) Priolec/Prevacid (for GERD)

Vitamin C (ascorbic acid) supplements

Taking vitamin B-12 with vitamin C might reduce the available amount of vitamin B-12 in your body. To avoid this interaction, take vitamin C two or more hours after taking a vitamin B-12 supplement.

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