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Reported side effects are typically mild and may include: Mild nausea (usually with oral forms) Temporary dizziness Gastrointestinal discomfort Injection site reactions (with injectable form) Most users report no significant side effects, making it an attractive option for those concerned about adverse reactions to traditional medications
refrigerate and discard after 60 days or if cloudiness or particles appear
Packaged in a controlled laboratory environment and prepared for research-use applications
[91] Since only bacteria and some archea possess the genes and enzymes necessary to synthesize vitamin B 12 , plant and algae sources all obtain the vitamin secondarily from symbiosis with various species of bacteria, [5] or in the case of fermented plant foods, from bacterial fermentation
PMC 4084863
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