Methylcobalamin hydrate is widely used in the treatment of vitamin B12 deficiencies, particularly in cases where neurological symptoms are present. It is effective in managing conditions like peripheral neuropathy, diabetic neuropathy, and other nerve-related disorders due to its role in nerve repair and regeneration. This compound is also utilized in the treatment of megaloblastic anemia, as it aids in the production of healthy red blood cells. Additionally, it is employed in the support of cognitive function and mental health, helping to alleviate symptoms of depression and memory loss. In the field of dermatology, it is used to treat certain skin conditions by promoting cell growth and repair. Furthermore, it is applied in the management of chronic fatigue syndrome and fibromyalgia, providing energy and reducing fatigue. Its role in methylation processes makes it valuable in detoxification pathways and in supporting overall metabolic health.