Hi My serum value B12 226 pg/ml, past 1 year ago had 162 pg/ ml so doctor prescribed 3 re-nerve plus injection. My current MMA - 481, active b12- 32, Homocysteine >50, folate - 1.19, ferritin serum 32.3. I have been facing floating sensation for past 2 years reduction in libido, pins and needles pain in palms and feet and some time severe pins and needle pain in penis after ejaculation Already visited many doctors don't know which doctor to visit. My symptoms are not getting improved come and goes not able to judge what is happening Kindly suggest first course of treatment should it be b12 injection or some other treatment like oral supplements and also which doctor I have to visit?