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Common Cutaneous Reactions: Urticaria and Contact Dermatitis One of the more frequently reported side effects of Vitamin B12 injections is cutaneous reactions, which can range from mild urticaria to severe anaphylaxis

To find more energy, youll need a series of daily shots, over the course of at least three months , because a red blood cells life-cycle is 90 days

Science 333 , 233238 (2011)

The workflow mirrors any lyophilized compound

Its also recommended to be cautious in people on certain medications like levodopa (without carbidopa), as mentioned, or those with specific medical conditions, but these are matters of caution rather than strict contraindications