Note: As written, no mention of B12.
I know I have previously seen the concept of fortifying with folic acid possibly being a problem in those who are B12 deficient being dismissed.
Folic acid is to be added to the most commonly consumed flours in the UK to help prevent spinal conditions in babies, the government has announced.
Doctors advise pregnant women to take folic acid supplements but, with about 50% of pregnancies in the UK being unplanned, many mothers-to-be may not be able to do this early enough.
The government said requiring flour millers to boost non-wholemeal wheat flour with folic acid will actively help avoid about 200 neural tube defects in babies each year – reducing the annual UK total by about 20%.
theguardian.com/society/202...
Adding link to BBC (accessible in the UK but likely not elsewhere) as the story there does mention B12:
bbc.co.uk/news/health-58615838
Also posted to my "home" Thyroid UK forum, in case it is of any interest: