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How to Choose Between B12 Injections and Oral Supplements Understanding B12 Absorption Rates: A Direct Comparison Intramuscular injections deliver B12 directly into the bloodstream, offering near-complete absorption
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PMID: 25953825
People over 50 years of age may show neurological changes due to vitamin B12 deficiency, resulting in an increased incidence of nervous and mental disorders among the elderly
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