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Different food items are rich in different types of vitamins and minerals, so you must eat a balanced diet to meet all your micronutrient targets

According to the National Institutes of Health Office of Dietary Supplements, vitamin B12 plays a critical role in red blood cell formation, neurological function, and DNA synthesis

NHS laboratories generally define deficiency as a serum B12 below approximately 148 pmol/L (equivalent to roughly 200 ng/L or pg/mL), though reference ranges vary between laboratories and results should always be interpreted in the context of local ranges and the patient's clinical presentation

The blood sample will be safely packed and sent to the laboratory for analysis and accurate diagnosis