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Supports brain and nerve function: Pyridoxine helps make neurotransmitters, while Nicotinamide supports cellular repair and energy production
They also achieve higher blood concentrations than typically possible with oral supplements
For people with absorption problems, such as pernicious anaemia, injections are medically necessary as oral supplements will not be absorbed effectively
Future directions First, define exposureresponse with quantitative pharmacokinetics and, where possible, receptor-occupancy or target-engagement biomarkers to guide dose selection across tissues
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