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Early warning signs of Vitamin B12 deficiency often include persistent fatigue and weakness, brain fog, memory and concentration issues, a smooth or sore tongue (glossitis), pale or yellowish skin, and tingling sensations in hands or feet
For I/M
arguments against the use of oral cobalamin Oral treatment may be considered in certain situationsfor example, in mild or subclinical deficiency with no clinical features and when absorption and compliance are definitely not a problem
Signs include feeling very tired, weak, and having nerve problems
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