Doctors typically use blood tests such as serum B12 levels, methylmalonic acid (MMA), homocysteine, and a complete blood count (CBC)
Cai, Y., Gilbert, M
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these reductions were significant compared to placebo (3.85 kg, P = 0.01
While Vitamin B12 injections can help improve energy levels, its important to rule out any underlying medical conditions contributing to your symptoms
Use timeframe: Use within ~14 days for best stability (common handling guideline)