Hi, I'm new to this forum . I'm a 60 year old white male in the UK.
During the course of extensive testing in the last year for endocrine disorders I have been d/xed with V. low testosterone, vit D deficiency and a recent test showed B12 at 260 (scale 160 - 800). Six weeks ago the level was 490. My local labs are reporting the current level as OK / within scale/ no action required.
Not knowing how B12 works, it seems that it is rapidly declining and is very near the bottom of the scale.......or does it fluctuate erratically perhaps?

Any serious advice would be most welcome.

Thanks in advance

Brice