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Such guidelines would help researchers find optimal dosages based on research objectives, desired outcomes, and the characteristics of the experiment
However, when absorption is impaired, both oral and sublingual supplementation forms can be effective
[1] [4] Mood changes including low mood, irritability, or anxiety can be associated with declining B12 levels, though these symptoms are non-specific and can have many causes
We recommend one injection once a week for 3 months and then once monthly
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