Your are likely to be feeling the affects of being B12 deficent for 5 years, it was not something to have causually neglected. B12 is a Critical nutrient to your Brain and nervous system, along with other systems, a long term deficiency can cause temporary to permenant neurological defects. The effects of the restoring your levels of this critical nutrient is not to feel worse, if you are concerned, try using another type of B12 supplement or brand, it is always better to use Methylcobalamine as a B12 replacement. If you have a gene defect assoc with MTHFR then the other type, B12 cobalamin, might cause a negative affect, but you would know this by now, and at that point you would know to always take the B12 Methylcobalamine. It is Wise to supplement if you want to be healthy as you grow older, it is not anything to mess with. It is critical in your Brain, nervous system, and multiple other functions in your body and so cheap to support thru supplements. Did you have your level checked? Is it now within normal limits? If it is super high you could have the MTHFR gene defect, which could be a possiblity if your B12 blood level was 8,000 instead of 800, (normal is 200-900). I would have your PCP assess your condition, and Always Supplement B12 Methylcobalamine. Did you know that in America 38 percent of Americans are low or deficent in B12? And it is mostly meateaters, not vegans, because Vegans supplement, and meateaters 'think' they are getting their B12 from the unhealthy sickly animals that make it to slaughter. You are on the right track, just always remember to supplement with B12 (Methylcobalamine)
Last edited by fineartmarcella; 01-23-2020 at 04:03 AM.