What are possible side effects to the b12?

Possible but rare. In general, B12 is very safe and well-tolerated and there is little danger in taking high doses. Occasionally nausea, diarrhea and rashes have been reported. It is advised to avoid in leber's disease, a rare hereditary eye condition. More info on B12 at http://lpi.Oregonstate.Edu/infocenter/vitamins/vitaminb12/ and http://www.Nlm.Nih.Gov/medlineplus/druginfo/natural/926.Html#safety.

Related Questions

Could you tell me what are possible side effects to the B12 vitamin?

Nerve effects. Reported side effects to B12 vitamin include anxiety, itching, diarrhea, muscle pain, but the frequency is different with each person. In general it is really difficult to take toxic doses of vit B12 since it is a water based vitamin and the body only absorbs and stores what it needs. Read more...