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Bottom line : Unless youre truly deficient, a B12 injection probably wont give you lasting energy or help you lose weight
Early haematological response begins with reticulocytosis (increased production of immature red blood cells) typically by day 3-4 of treatment , particularly with injectable forms, though the full resolution of symptoms may take several weeks to months
Archived from the original on September 8, 2017
If you havent been tested yet, speak to your GP or ask us about our private blood testing options
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