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The body absorbs only as much B12 as it needs, and any excess is eliminated naturally
Most prescribers recommend avoiding alcohol on injection day and for 24-48 hours afterward, when plasma concentrations peak and GI side effects are strongest
From understanding the complexities of diet and exercise to managing the psychological aspects of weight loss, many individuals struggle to find an approach that works for them long-term
Peer review Peer review information Nature Chemistry thanks the anonymous reviewers for their contribution to the peer review of this work
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