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Allergic reactions to proprietary preparations of vitamin B12 might be due to substances added to the solutions as preservatives or for other reasons, to impurities from the production, or to the vitamin B12 itself
Dose and frequency depend on your B12 levels and underlying condition
You exercise five days a week
I think I must need more B12
Researchers are responsible for compliance with all applicable regulations and institutional protocols
To make sure this medicine is safe for you, tell your doctor if you have: eye problems or Leber's disease (in you or a family member)
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