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How often do I need Vitamin D injections
United Kingdom National Quality Assessment Scheme for Haematinic Assays (UK NEQAS), 18 February 2014
The standard schedule is a starting point, not a strict rule The 2024 NICE guideline NG239 on B12 deficiency in over 16s makes an important point: the optimal route, dose and frequency of B12 replacement have never been firmly established, and have often followed custom and historical practice
It is what the data do not show
Human safety is not established because large human trials have not been completed
If hunger, waist, or weight drift shows up in the back half of the interval, weekly dosing is the cleaner maintenance schedule
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