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Optimized, or taking too much
Ng FM, et al
Sessions typically last 30-45 minutes, with relief following a predictable pattern: headaches ease first as blood volume increases, then energy improves as B vitamins kick in, finally nausea subsides as medications take effect
doi: 10.3390/ph3010125
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If you are genuinely low in B12, some people notice more energy within a few days, while correcting nerve symptoms or anemia takes longer
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