What is the over dosage of B12, what are the side effects?

Question

1000mcg

Answer 1

There are very few risks associated with B12 overdose.B complex are water soluble so if anything your pee will be very yellow for a while.Probably not a big deal.If you do happen to feel sick then seek emergency care but I doubt it will happen.Just don't take any more for a few days and you'll purge the excess.I have taken this much before with no ill effects.Metnx is a prescription supplement and it contains twice that dose of biologically active B12 and it's safe.I've taken Metnx with a 500 mcg supp before

Answer 2

Reference Nutrient Intakes for Vitamin B12, µg/day. (1000 µg = 1mg)

Age RNI
0 to 6 months 0.3 µg
7 to 12 months 0.4 µg
1 to 3 yrs 0.5 µg
4 to 6 yrs 0.8 µg
7 to 10 yrs 1.0 µg
11 to 14 yrs 1.2 µg
15 + yrs 1.5 µg
Breast feeding women 2.0 µg

Overdose
Vitamin B12 has a very low likelihood for toxicity.

Medicinal Purpose
Vitamin B12 can treat pernicious anemia, depression, Crohn's disease and high homocysteine levels. It is also helpful for treating high cholesterol, asthma, diabetes, chronic fatigue syndrome, and Alzheimer's disease, among others.

Answer 3

These are fine. There are no known side-effects to high dose intakes of B12 (>5,000 mcg per day). High doses of B3 (much higher than you are taking) can produce flushing of the skin and intense itching. There is some concern (it is controversial) that very high doses of B3 for long periods of time can cause liver damage. So, very high doses of B3 should be done under proper professional supervision with periodic liver function blood tests. Best wishes and good luck.

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Answer 4

1000 mcg is no od. If there is one it would be many multiples of that doseage. The b group is water soluable as opposed to fat soluable like d and a. Their are b 12 strips for sale that are in fact 1000 mikes per dissolvabel strip and designed to be taken on the tongue every morning so no big deal.

Answer 5

I think it makes black people turn white.It also will make your stomach hurt. why would you want to take 1000mg of b12 it want make you jump higher or run faster just make your belly hurt might have to go to the bathroom a lot.If you get real sick might want to call the doctor or poison control.

Answer 6

With children it is extremely deadly! Get to emergency room immediately! In adults it effects how your body processes other medication, so there are risks involved.