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Vitamin B6 Blood Test High

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Vitamin B6 helps maintain normal nerve function and form red blood cells. Major sources of vitamin B6 include:

Cereal grains and flour

Vegetables like peas, spinach, and carrots

Seeds and nuts

Legumes

Potatoes

Milk and cheeses

Fish, meat and eggs

Liver

Deficiency of vitamin B6 has been implicated in a wide variety of clinical conditions. Important in neonatology, it is the syndrome of jittery characteristics, irritability, easy startling, colic, and seizures due to B6 deficiency following ingestion of formula rendered B6 depleted by excessive heating.
Vitamin B6 deficiency can be more prevalent in people who:.

What Does It Mean If Your Vitamin B6 Result Is Too Low?

Many of these are related to amino acid synthesis, fatty acid metabolism and hemoglobin synthesis. The vitamin is also important for the synthesis of serotonin and dopamine.
The immune system, heart and blood vessels, detoxification (methylation) and cognitive health are dependent on vitamin B6. Normal Ranges for Vitamin B6 in mcg/L:

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Adults: 5-50 mcg/L

Critical Range: <5 or >50 mcg/L

Source.

Msd Manual

Oxicity is rare but can result from taking high doses of vitamin B6 supplements.
Good sources of vitamin B6 include dried yeast, liver, other organ meats, whole-grain cereals, fish, and legumes. Vitamin B6 in very high doses may be prescribed for such disorders as carpal tunnel syndrome or premenstrual syndrome, although there is little evidence of benefit. Thus, walking becomes difficult.

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In fact, according the USP, up to 50% more is permitted for B vitamins.So, yes, it is possible that your multivitamin provided more than the daily upper limit of vitamin B6 — putting you at some risk of toxicity with long-term use. This is because your supplement provided an amount of B6 close to the upper limit (and much more than normally needed) and there is an allowable manufacturing overage, as noted above. Foods also contribute B6, but non-fortified foods would be unlikely to put you over the UL since foods naturally rich in B6 (like liver, other meats, potatoes, and bananas) provide about only about 0.25 to 1 mg of B6 per serving.

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