Assay interference, sample handling and taking a supplement shortly before the blood draw can all distort a reading, and different laboratories use different methods and reference ranges
Lack of these vitamins in your diet Not eating enough vitamins in your diet can cause many health problems, including a Vitamin B12 deficiency
An injection skips all of that and delivers a full dose straight into your bloodstream
Clinically, however, the evidence is mixed : Vitamin B12 has a well-established role in energy metabolism, especially in deficient individuals
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At CoLaz, B12 injections are delivered by trained clinicians after a written consultation that screens medical history, medications, current symptoms and (where the picture warrants it) an NHS blood test through your GP