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Possible B12 injection side effects tend to be mild and short-lived, and may include: Injection site pain, redness, or swelling Mild itching Brief diarrhea (less common) A feeling of warmth after the injection Serious side effects are rare
Certificate: The course is fully CPD accredited with certificate
A small percentage may notice: + Mild tingling or flushing on application + Temporary breakout shift (usually resolves in 12 weeks) + Short-term textural change as cell turnover increases Use with caution or skip if you have a known copper allergy or Wilson's disease (a copper metabolism disorder)
All you can expect is mild headaches, indigestion, nausea, swelling, etc
Research-use-only context
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