B12 causes rash
Whenever I take B12 I develop a painful shingles like rash the size of a half dollar which can come up on my lower torso but never above the waist. I have had up to three at one time all at different locations. I have asked my doctor about it and he just says...never heard of that. I am always tired and would love to get that B12 boost but it's not worth the pain and itching that comes with it. I would love to know if anyone has an explanation of why this is happening and if there is a combination of vitamins that would allow me to take the B12 and keep this from happening.