Anaemia means that:

You have fewer red blood cells than normal, OR
You have less haemoglobin than normal in each red blood cell.
In either case, a reduced amount of oxygen is carried around in the bloodstream. There are a number of different causes of anaemia (such as lack of iron or certain vitamins).

Vitamin B12 is essential for life. It is needed to make new cells in the body such as the many new red blood cells which are made every day. Vitamin B12 is found in meat, fish, eggs, and milk - but not in fruit or vegetables. A normal balanced diet contains enough vitamin B12. A lack of vitamin B12 leads to anaemia and sometimes to other problems.

What are the Symptoms?

Fatigue, tiredness, lethargy, hypotension, tachycardia, shortness of breath, feeling faint, cognitive impairment, diarrhoea, pins and needles, jaundice, headaches, palpitations, altered taste, being off your food, tinnitus, swollen tongue, personality or memory changes, looking pale
Why Test for anaemia?

Pernicious A