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How long does it take to see improvement with B12 replacement
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A lift in mental fog: Brain fog is one of the most frustrating symptoms of deficiency
[73] As noted above, the completely synthetic laboratory synthesis of B 12 was achieved by Robert Burns Woodward and Albert Eschenmoser in 1972, though this process has no commercial potential, requiring more than 70 steps and having a yield well below 0.01%
A: Injections are more effective for individuals with absorption issues or who need rapid nutrient restoration
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