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The top 2 tested brands of B12 subling is Enzymatic Therapy and Jarrow according to what I have read, and the longer you keep it under your tongue or lip the better.

Yes I had MMA testing done, I wish I could do the active B12 test but they do not offer it.

I am above normal but all research shows normal is NOT normal, sorta like thyroid levels. Also, I was on B12 before the test which shows active and inactive B12.

Reality is, dose according to symptoms.

My dr knows how much I am taking, while he may not agree I need it, he is not worried as there is no toxic level of B12 known since you excrete it.

The above forum was amazing place for information on B12