The difference between the B vitamins and C is mainly due to their different roles. Vitamin B mainly includes vitamin B₁, vitamin B₂, vitamin B₁₂, as well as folic acid, etc., the main role of which is to participate in the body’s metabolism of sugars, proteins, fats and so on. It can also accelerate the body’s metabolism and promote hair growth. It also promotes the body’s digestive function and is an essential vitamin for the human body. Vitamin C is a water-soluble vitamin, its role is to participate in the formation of antibodies and collagen, repair tissue, substance metabolism, iron and carbohydrate utilization, substance synthesis, hydroxylation of 5-hydroxytryptophan, and maintenance of immune function, etc., and at the same time, it can maintain the integrity of the blood vessels, and promote the absorption of non-heme iron. If the lack of vitamin C can lead to scurvy, increased blood lipids, decreased immunity. Lack of vitamin B can lead to mouth ulcers, insomnia, anemia and other phenomena. It is recommended to eat more food containing vitamin B and C, such as tangerines, oranges, apples, kiwi, spinach, cabbage, etc. If symptoms of vitamin B and C deficiency occur, it is recommended to go to a professional hospital and take reasonable supplements under the guidance of a doctor.