The main role of vitamin pp is to participate in various dehydrogenation reactions in the body, acting as a coenzyme. Vitamin pp deficiency is associated with mange, which is characterized by dermatitis, diarrhea, and dementia, often in exposed areas of the body, and dementia as a result of neurodegeneration. In addition, vitamin pp is recently used as a cholesterol-lowering drug because it inhibits lipolysis in adipose tissue and fat mobilization, resulting in lower cholesterol. Vitamin pp can cause blood vessels to dilate if taken in excess, and it may be damaging to the liver when taken in large amounts over a long period of time, so proper care should also be taken.