Vitamin B12 monitoring — anyone have experience?

Dr.NutriCornell said:

The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either.

Adding a me-too, because a thread of one person's experience is not much use. Nothing to add that would improve it.

labquiet_amy said:

Keep the original post as written when you update it, and add the correction underneath.

Coming at labquiet_amy’s question from a different direction. Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the correction. That is slower than asserting, and it is the only version that survives being wrong.

The figures, for anyone assembling their own picture. One practical note: write down what you did and when, before you need it. Reconstructing a timeline from memory three months later is how people end up unable to answer the one question that would have resolved it.

One thing that is still open after labquiet_amy’s answer:

Was that from a primary source or from a summary of one?

Moderator note: good thread. Keeping it here rather than moving it, because the question is general enough to be useful. Tagging this one for the weekly digest.