However, some patients receiving high-dose B12 supplementation or injections may experience adverse reactions, though these relate to the treatment rather than the elevated levels: Possible reactions to B12 supplementation (particularly injections): Skin reactions, including acneiform eruptions or rashes Pruritus (itching) Injection site reactions (with parenteral administration) Rare hypersensitivity reactions Non-specific symptoms such as headaches, dizziness, or gastrointestinal disturbances have been reported by some patients taking B12 supplements, but causality is not well established in clinical evidence
If you feel as though you are not getting an adequate amount of Vitamin B12 in your diet and/ or experiencing fatigue, decrease immune system or not feeling rested throughout the day you are definitely a candidate for a vitamin B12 injection
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Ultimately, the standard average vitamin B12 intake per day should be around 2.4 mcg (micrograms) for individuals above 14 years
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