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When myelin insulation weakens, B12 helps rebuild it, improving nerve signals and easing tingling or burning sensations

The most prevalent symptoms of vitamin B12 deficiency are neurologic, such as paraesthesia in hands and feet, muscle cramps, dizziness, cognitive disturbances, ataxia, and erectile dysfunction, as well as fatigue, psychiatric symptoms like depression, and macrocytic anaemia." Even if a person gets enough vitamin B12 in their diet, some underlying health conditions can affect the absorption of vitamin B12 in the gut

Feeling tired or sluggish

Nicotinamide (Vitamin B3) Supports cellular energy production, nervous system function, and skin health

According to the American Academy of Orthopaedic Surgeons, it may take several weeks to notice an improvement [2]

Hematologic disorders Acquired (autoimmune) hemolytic anemia Idiopathic thrombocytopenic purpura in adults (I.V