Treatment: Anaemia is caused by iron or Vitamin B12 deficiency.

疗法：贫血是缺乏铁或者维他命b 12所引起的。

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Vitamin B12 deficiency is the most common problem found in vegetarians.

维生素b 12缺乏是素食者普遍存在的问题。

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The prevalence of Vitamin B12 deficiency is higher in vegans than in omnivores.

纯素食者的B12缺失发生率比不吃素的人高。

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Taking too much folic acid - over 1mg a day - can mask signs of vitamin B12 deficiency.

BBC: Vitamin B 'puts off Alzheimer's'

Professors Brian Wharton and Ian Booth, from the Institutes of Child Health in London and Birmingham, warned that in people with vitamin B12 deficiency, consumption of folic acid may mask a condition called megaloblastic anaemia - which if not picked up can lead to degeneration of the spinal cord.

BBC: Caution urged over folic acid

We see high HgA1Cs that are accurate measurements, but not reflective of glucose control in people with low red cell turnover from iron, vitamin B12 or folate deficiency.

CNN: Why do my A1C results from different sources vary?