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C., & Johnson, V
Future research should focus on large-scale, well-controlled randomized trials with standardized dosing protocols, clearly defined deficiency thresholds, and long-term follow-up to strengthen the evidence base and guide clinical practice
Note any changes in morning energy, afternoon slumps, or exercise performance
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Vitamin B12 is essential for healthy red blood cells and nerve function, and when levels are low, symptoms can build gradually and be easy to dismiss as stress, sleep, or a busy life
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