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10.3390/jcm8040551 95 PasternakG
- Fatigue or Low Energy: B12 is vital for energy production, and low levels can lead to fatigue
Follow-up Repeat metabolic markers after 8-12 weeks or sooner if appetite, hydration, vomiting, or glucose symptoms change
Wildly different quality, vague labels, missing certifications, and marketing claims that would make any clinical nutritionist wince
A raised MMA in particular is the standard way to confirm that a deficiency is real at cell level
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