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The usual dose for vitamin B12 injections is 1000 mcg (1 mg), given by injection
Continuous long-term use has not been adequately studied, and the safety of prolonged dosing remains unknown
Pre-filled pens won't be available until FDA approval
But collagen normally found in your diet may be difficult for your body to absorb because of its size and structure
Aliquoting, as discussed earlier, is the most effective countermeasure
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