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how much b12 is in 1ml injection Cyanocobalamin – 1000 mcg/mL b12 injections needle size Amazon.com:
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Effects can be felt in hours to days, not weeks

What Are Vitamin B12 + C Injections

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A 1 ml syringe may be more comfortable for frequent, smaller doses, while a 3 ml syringe may be better for less frequent, larger doses

Disclaimer: This article is for informational purposes only and does not constitute medical advice

A little on my nose as well
