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For example, if your supplement happens to be 10 g, then cutting it in half and taking the resulting 5 g supplement twice a day (at least 4 hours apart) will meet the EFSA recommendations
It can take 24 to 72 hours to feel results
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Certain medications may reduce the effectiveness of B12, including antibiotics, H2 blockers, birth control pills, and medicines that reduce stomach acid
In a nationwide study, liver disease was associated with a higher incidence of major bleeding among anticoagulant users (Jeong et al., 2024)
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