side effects to b12 injection Safety, & Risks B12 injection side effects :

Over time, expired B12 injections may lose their potency, meaning they might not provide the intended health benefits

While it can be effective for some, others may experience side effects such as: Dizziness Weight gain Swelling in hands and feet Dry mouth Blurred vision Difficulty concentrating Many people with fibromyalgia are sensitive to medications, so even mild side effects like dizziness or difficulty concentrating can significantly impact your day-to-day life

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