A lack of B12 can lead to anemia (not having enough red blood cells), which causes you to feel tired and weak
Second, its essential to understand that there can be significant quality differences between B12 suppliers, impacting the effectiveness of the B12, its duration in your system, and even its safety
Very high doses may occasionally cause hypokalaemia (low potassium), particularly in patients with severe megaloblastic anaemia when treatment is initiated, necessitating monitoring in hospital settings
Accessed Janaury 14, 2025
[3] The speed of response depends on multiple factors including the severity and duration of deficiency, the presence of neurological complications, and individual metabolic differences