DEAR DR. ROACH: I am 73, and I was worried about dementia. Turns out, I am “normal.” However, the neurologist told me to take 2,000 mcg of B12 daily. My multivitamin has 100 mcg, which is 4,167% of ...

Dear Doctor: I'm almost 90 years old and always tired. I took two capsules of 2,000 mcg vitamin B12 the other night, and felt stronger and not as tired. Is it safe? Dear Reader: My first thought is ...

Dear Dr. Roach: I’m a vegan, and my multivitamin is my only source of B12. It states I’m getting 200% of my daily requirement. Is that sufficient? Dear M.E.: People who are strict vegans — that is, ...

Q: Years ago, I started taking a vitamin B12 supplement. Over the past few years, I have had disabling pain in my feet diagnosed as nondiabetic neuropathy. The primary symptoms were burning, stabbing ...

DEAR DR. ROACH: I’m a vegan, and my multivitamin is my only source of B12. It states I’m getting 200% of my daily requirement. Is that sufficient? — M.E. ANSWER: People who are strict vegans — that is ...