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Benzyl alcohol prevents bacterial growth, allowing for multiple-dose use via intravenous or intramuscular injection
1 2 European Food Safety Authority (25 September 2008)
Serious side effects are extremely rare
The recommended vitamin B12 intake (in micrograms, or mcg) is as follows: *Adequate Intake S ource: National Institutes of Health Office of Dietary Supplements Unless you have a B12 deficiency or have identified a risk factor for deficiency (like following a vegan diet or having a malabsorption issue), theres no need to take a vitamin B12 supplement
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