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Leaving your medicine in a parked car even for a short period is risky
The short plasma half-life (~14 minutes) means peak levels are transient, which is why weekly or biweekly protocols are common in clinical practice
10.1136/gut.46.5.622 108 SchirraJ.NicolausM.RoggelR.KatschinskiM.StorrM.WoerleH
This makes getting the right nutrition a manageable daily practice
A supplement can support health, but it should not replace medical assessment when deficiency, anemia, nerve symptoms, or another illness may be present
The ideal frequency of B12 injections depends on your individual health needs, underlying medical conditions, and personal wellness goals
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