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Cited studies are preclinical research, not therapeutic claims
They cannot pass through a cell's fatty membrane, so they bind to receptors on the cell surface to send their signals inward
Many competitors sell BAC water at $10-$15 but add $8-$15 shipping charges, bringing the effective cost to $18-$30 before any processing surcharges
People without a deficiency should not take megadoses of B12
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