What are the side effects of B12 shots?
Answer:
None except a sore spot.
I use a Liquid B-12 with Folic Acid. i catch great results without the stomach-ache or a doctor office pop in.
http://www.vitaminshoppe.com/store/en/in...
Oral B-12 supplements are not generally associated next to any side effects.
Although, quite irregular, serious allergic reactions to injections of vitamin B12 (sometimes even life span threatening) have be reported. Whether these reactions are to the vitamin itself or the preservatives or other substances contained by the injectable B-12 solution, remains somewhat unclear. Most, but not adjectives, injectable vitamin B-12 contains preservatives.