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Chemically, vitamin B12 can exist in various forms
This helps prevent localized skin irritation, bruising, and the buildup of scar tissue at any single location
For example, if you added 3ml instead of 2ml to a 10mg vial, your concentration is 3.33mg/ml instead of 5mg/ml
Proton pump inhibitors and similar medications that lower stomach acid might decrease the absorption of vitamin B12 from food, but this is less of a concern when receiving B12 injections because they bypass the digestive system entirely
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