Vitamin B12 is normally found in animal-based foods, like meat, egg, fish, milk, and dairy, so most vegetarians suffer from vitamin B12 deficiency. The symptoms are tiredness, feeling lightheaded, pale skin, tingling sensation, muscle weakness, etc.
Multiple Sclerosis - Types, Symptoms, Causes, Diagnosis, and Treatment
Multiple sclerosis is a chronic autoimmune disease that affects the protective sheath (myelin) that covers the nerves of the brain and spinal cord.

Infantile Tremor Syndrome: Causes, Clinical Features, Diagnosis & Treatment
Infantile tremor syndrome is characterized by amnesia, regression of motor development, and delayed development in children. Read below for more details.
Psychiatric Manifestations of Vitamin B12 Deficiency
Vitamin B12 deficiency causes psychiatric symptoms like depression and anxiety, which are treatable with timely B12 supplementation.
A Comprehensive Review on Cyanocobalamin Nasal Spray
Vitamin B12 in the synthetic form represents Cyanocobalamin. It is frequently used to treat pernicious anemia and vitamin B12 deficiency.