The deficiency of these vitamins can cause anemia
Vitamin B12 deficiency causes neuropathies, among other ailments, in addition to anemia. The folate, also a vitamin of complex B, helps in energy production from carbohydrates, hence fatigue when we have a folate deficiency.
The folate is among the vitamins recommended to future mothers, because it avoids neurological deficiencies in the fetus.
Both the lack of ingestion of rich foods in these vitamins, as problems in their absorption can cause deficiencies.
This test measures its levels of B12 and folate to detect whether they are at their normal levels or not.