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Role of Vitamin B12 in the Body Vitamin B12 helps make red blood cells that carry oxygen
In many mild or borderline cases, especially in vegetarians, oral Vitamin B12 supplements can be just as effective and are completely safe
This is one of the earliest signs that the injection is helping your body produce more red blood cells and improving oxygen transport
Some users report subtle increases in energy levels, reduced appetite, or slight improvements in how clothing fits during this initial phase
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