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@hopefullibrarian I thought our bodies flushed out B12 that was beyond what was needed. I am posting info from the Mayo site below, which you have no doubt seen. Have you been taking high doses daily? It seems high doses can raise levels- I didn't know that! I did have tingling/burning from Evenity. I guess if you stop taking B12 you will find out whether it is the vitamin or Evenity!
When taken at appropriate doses, vitamin B-12 supplements are generally considered safe. While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, higher doses have been found to be safe. Your body absorbs only as much as it needs, and any excess passes through your urine.
High doses of vitamin B-12, such as those used to treat a deficiency, might cause:
Headache
Nausea and vomiting
Diarrhea
Fatigue or weakness
Tingling sensation in hands and feet
Replies to "@hopefullibrarian I thought our bodies flushed out B12 that was beyond what was needed. I am..."
That's correct @windyshores. Excess B12 is expelled in the urine. First the body builds up a storehouse in the liver which it can then use when intake drops off. Not having enough of it can lead to neurological disorders or even perniciuos anemia. I'm going to guess that my storehouse in the liver is full, and that's why there's so much in my blood waiting to be expelled. I'm going to stop taking it for a while, because my body appears to just be spitting it out. Like @normahorn, it's something I'll have to keep an eye on especially because I have a genetic variant that impedes my body's ability to absorb it from food.
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My body failed to read what the "experts' claim. I can only take a B12 supplement once a week (and that is at half standard dosage) or my levels also go off the chart. Another effect of high level is that I was beginning to think I may have colon cancer. Thankfully that cleared up when I stopped taking it. I now monitor every 6 months so I do not slip into the deficient range again.