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While very high oral doses (1,000 to 2,000 mcg) can achieve some passive absorption without intrinsic factor roughly 1% of the dose is absorbed passively many clinicians prefer the reliability and rapid correction offered by injections in this population
Key considerations include: Always check the strength on the product label
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Taking vitamin B5 together with antibiotic tetracycline will interfere with the absorption and effectiveness of these antibiotics
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