do b12 injections cause headaches Vitamin Side Effects Why do I feel worse

Vitamin B12 is generally well-tolerated and safe when taken at recommended doses

Whilst oral absorption is limited, regular consumption of mega-doses can elevate serum levels substantially

Citicoline improves memory performance in elderly subjects

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[14] [15] Patients with significant anaemia require monitoring of serum potassium, particularly during loading doses

Vitamin B12 primarily comes from animal-based products, which makes those who follow vegetarian and vegan diets more likely to develop vitamin deficiency