Reference ranges aside, does anyone know of any studies that have shown what a normal b12 level looks like?
Reference ranges I guess are made up from averaging b12 results from all tests done on people who were not referred to the lab with symptoms.
Also does anyone know how long it takes the liver to 'fill back up again' once the levels have become depleated.
I got my levels up to around 900pg using sublingual hydroxycobalamin but missing one days has a definite effect on how I feel. (Blood tests done while still supplimenting, tested before supplimenting on the day).
Wouldn't stored b12 come into play on any days you missed supplements? Surely that's why they leave weeks between injections or does the injected b12 stay in the muscle/fat rather than being stored in the liver?