If you feel fatigued, numb, or foggy despite healthy habits, a B12 deficiency could be the cause
A common laboratory dilution is 1 mL of bacteriostatic water per 5mg vial, giving a 5 mg/mL solution
Vitamin B12 is essential for neurologic function, red blood cell creation, and DNA synthesis and is a coenzyme for three primary biochemical conversions: homocysteine to methionine, 5-methyltetrahydrofolate to tetrahydrofolate, and methylmalonic acid to succinyl coenzyme A [1, 2]
Genuine B12 deficiency can contribute to anxiety-like symptoms, irritability, low mood, and a "wired but tired" feeling and correcting it can meaningfully improve how you feel
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