Vitamin B12 is frequently low in thyroid patients.
However, it is a complex subject and it is likely better to go directly to specific B12 information sources than for thyroid sources to attempt to replicate what is available.
Various B12 Information Sources
This recent paper is an excellent summary about B12 treatment.
Vitamin B12
Bruce HR Wolffenbuttel, 1 P Julian Owen, 2 Mary Ward, 3 Ralph Green
https://www.bmj.com/content/bmj/383/bmj-2022-071725.full.pdf
One cause of low B12 is a disorder called Pernicious Anaemia in which it is impossible to absorb sufficient B12 from the digestive system. One good forum for this is the Pernicious Anaemia Society forum on HealthUnlocked.
While they are focussed on Pernicious Anaemia, the forum regularly has discussions about other forms of B12 deficiency, treatment, testing, etc.
Pernicious Anaemia Society
https://healthunlocked.com/pasoc
Further sources may be found in my general information finding document:
helvella's Links and References document contains many links to other organisations
A single document containing numerous links to relevant websites. With a focus on the UK it nonetheless includes many non-UK sites.
Rather than a simple list of links, there is a page (or more) per site. This is intended to provide some flavour of the site before you decide whether to visit.
https://helvella.blogspot.com/p/helvella-links-and-references.html
Two parts of NICE also directly cover B12. One is a Clinical Knowledge Summary, the other a full formal guideline (currently still in development). The two sometimes are in conflict over recommendations.
NICE > CKS > Health topics A to Z > Anaemia - B12 and folate deficiency
Anaemia - B12 and folate deficiency
https://cks.nice.org.uk/topics/anaemia-b12-folate-deficiency/
Home > NICE Guidance > Conditions and diseases > Blood and immune system conditions > Blood conditions
Vitamin B12 deficiency in over 16s: diagnosis and management
Vitamin B12 deficiency in over 16s: diagnosis and management
NICE guideline [NG239] Published: 06 March 2024
https://www.nice.org.uk/guidance/ng239
For posting in HealthUnlocked, copy and paste the entire dark red text below this sentence.
[i][b]helvella - B12 Information[/b]
A short blog acting as a pointer to some sources of information about B12 deficiency.
Last updated 10/02/2025[/i]
Link to blog:
https://helvella.blogspot.com/p/helvella-b12-information.html
If you find anything incorrect, misleading, typos, links that don’t work, etc., please let me know. Go to my profile and use the contact details there.
