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Precautions General Precautions: Vitamin B12 deficiency that is allowed to progress for longer than 3 months may produce permanent degenerative lesions of the spinal cord
(Those over 65 years of age, however, should take at least 1,000 mcg cyanocobalamin every day.) If you get a B12 injection, the likelihood of it triggering acne may only be about one in ten
They are usually safe but can cause problems for some people
Check for blood by aspirating
Side effects and adverse reactions are possible with any medication, including FDA-approved peptides
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