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The metabolic benefits are also impressive
Community sources and pharmacy references describe Hospira as the benchmark because of two attributes that the formula itself does not differentiate: supply chain traceability (every vial is traceable from manufacturing through distribution to end user) and regulatory accountability (FDA-registered facilities are subject to inspection and enforcement)
Sikiric et al., 2013
The body cannot produce B12 and therefore it is important to eat nutritious food so that the body can instead absorb vitamin B12 via the diet
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