Vitamin B12 deficiency is a common problem that everyone encounters
The application of NICE guidelines outside of England varies: Scotland, Wales, and Northern Ireland: These parts of the UK have their own guideline development bodies (SIGN, TGCS, and BSG, respectively)
Vitamin B12 is naturally found in animal products like meat (especially liver), fish (salmon, tuna), poultry, eggs, and dairy products (milk, cheese, yogurt)
It is for use in cattle, sheep, and swine to provide treatment of Vitamin B deficiencies and to provide a supplemental nutritional source of these vitamins
A proper blood test gives your doctor the concrete data they need to make an accurate diagnosis and get you on the right treatment path