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You can use: The deltoid muscle is in the upper arm
They may include: Slight discomfort at the injection site Mild redness or swelling Temporary dizziness Mild headache Serious side effects are uncommon, but it is important to discuss medical history, allergies, medications, and any concerns before treatment
Consistency is key to help your B12 levels rebound and function properly again long-term
Informal protocols generally avoid doubling the next amount because safety and dose limits are unknown
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