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If you often feel tired despite sufficient rest, it might be worth considering your B12 levels
Neutralizes toxins in the body to keep skin, hair, and nails strong
However, vitamin B 12 deficiency does not generally develop until after at least two-to-three years of continuous therapy (137-139)
Subcutaneous, intramuscular, and even oral routes all show effect, though injectable routes generally show better uptake and more predictable results
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