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Now, while injectable B12 is generally very safe, it is important to be aware of potential side effects
Guilherme A et al
Precautions & Safety Information Let your provider know if youre taking any medications, supplements, or OTC drugs
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When your body does absorb B12, it takes time for the vitamin to be distributed throughout the body and more time for the body to use it in a way that is noticeable
This side effect may cause symptoms such as weakness, fatigue, muscle cramps, or irregular heartbeat
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