What happens if your B12 is too high?

What causes extremely high B12 levels?

The most common cause of high B12 in the blood is due to recent ingestion or injection of supplemental vitamin B12. We don't worry about overdosing on B12 supplements because excess can be excreted in your urine. It could also be possibly from your diet if high in animal products such as meat, eggs, and shellfish.

How does your body get rid of excess B12?

The body will typically excrete excess vitamin B-12 that a person gets from the diet or via supplements. The body does not absorb vitamin B-12 supplements very effectively. This means that even if a person takes very high amounts of vitamin B-12, their body still does not absorb a significant amount.

What is considered a high B12 level?

An elevated B12 is generally defined as a level higher than the upper limit of the normal range, around 1000 ± 100 ng/L (738 ± 73.8 pmol/L)2,3,4.

Is B12 level of 1500 too high?

There is no consensus on the definition of high or elevated B12. Previous studies have chosen a variety of levels to represent high or very high B12 (pmol/l) levels. Some examples include: 664.219; 5131; 700 (high) and 1500 (very high)11; and 601 (high) and 1000 (very high)10.

Can diabetes cause high B12 levels?

Increasing duration of diabetes was associated with higher serum Vitamin B12 levels.

Is 1100 B12 level too high?

The normal range for vitamin B12 (total) is between 200 – 1100 ng/L (nanograms per liter), 200 – 1100 pg/mL (picograms per milliliter), or 148 – 811 pmol/L (picomoles per liter). The normal range for active vitamin B12 (holoTC) is around 20 – 134 pmol/L (picomoles per liter).

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