If the body lacks the intake of vitamin B in daily life, it will easily lead to the decline of the body’s immunity and be attacked by external bacteria and viruses causing colds, timely supplementation of vitamin B and other nutrients. Like eggs, mushrooms, etc. are rich in vitamin B2 food, can be appropriate intake, often eaten soybeans, peanuts can supplement the body’s lack of vitamin B1 components, vitamin B6, vitamin B12 richer food are milk, nuts, fish, etc.. If the problem of vitamin B deficiency occurs, you can first go to a blood draw or other tests to confirm the diagnosis of which element of vitamin B deficiency, and then the appropriate amount of supplementation of the corresponding food. If the vitamin B deficiency is more serious, you can take oral multivitamins for treatment.