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Natural: Synthetic cyanocobalamin requires conversion in the liver to become active, which means some people may not absorb it efficiently
The formulation (pure peptide, proprietary blend, lyophilized vs solution) matters
Because you cant do a risk-benefit analysis anymore. Myers said a recent analysis found that a substantial number of research peptide products purchased online did not contain the active ingredient they claimed
Conditions like pernicious anemia, for instance, require ongoing B12 injections for life due to a fundamental absorption issue
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