I've been supplementing with B12 spray and Jarrow 5000 mcg sub lingual tablets for around 10 months now (along with Thorne B complex). This has cleared up the neurological symptoms I was having (poor coordination, memory problems) but I was still getting breathless when walking up hills or climbing stairs. I have suspected for a while that I might have low stomach acid and / or a gluten / wheat intolerance (which I believe will also have an impact on stomach acid and absorption). For the past four weeks I have been taking Betane HCL tablets on a daily basis with my evening meal. I have also gone gluten free.
This seems to have eased my breathlessness considerably, and as an "experiment", I decided to taper down my B12 intake to see if the symptoms came back. For nearly 10 days now I have taken *no* B12 supplements and had no return of my neuro symptoms or breathlessness.
Would the fact that I now have more stomach acid (and gone G/F), mean that I'm absorbing enough B12 in the normal way (I.e. from my food), and not needing the supplements? All very strange .....