I referenced Linus Paul. They recommend Fad, (B2) with metafolin. I have been using regular B2 for a while but haven't noticed a difference. They say deficiencies can cause burning hands and feet which I have bouts with. It would be amazing if the combination can help with the burning.

I was going to add a slow release niacin next.

I have been taking 10,000 units of methyl B12 daily to catch up. I thought it was water soluble and any extra would just flush through. Is that wrong?

I read about the other b12 you referred to and will have that on hand too.
Thank you