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This is fundamental, so the 3-month kit below may be a good starting point
They are all professional and friendly
For patients with impaired liver function or genetic variants affecting B12 metabolism, methylcobalamin may be preferable
This data comes from animal models and may not translate directly to human physiology
It is important not to self-treat with high-dose B12 supplements before seeing your GP if you suspect deficiency, as this can interfere with diagnostic blood tests and potentially mask underlying conditions such as pernicious anaemia
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US$ 28.80
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US$ 24.00
