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The progression of disease is slow and symptoms can take a few years to present
doi:10.1042/BST20120066
The effects of B12 shots will last a few weeks or even months, depending on your age and diet
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Also, the last image could be misleading as i have never given this injection in the deltoid
Fortunately, there is increasing evidence that oral B12 supplements are just as good as injections for raising blood levels in most people ( Vegetarians and vegans are usually advised to take at least 10 mcg per day, or at least 2,000 mcg once per week ( However, some doctors still prefer the use of injections
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