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*Vitamin A is one of the essential trace elements for the human body. Vitamin A can promote the synthesis of immune proteins, maintain the normal metabolism of epithelial cells, and promote immune function.

*Vitamin B5, Vitamin B5 is also known as pantothenic acid. It mainly participates in the production of energy in the body and can control fat metabolism. It is an essential nutrient for the brain and nerves, and also helps reduce the emotional impact of stress. *Vitamin B3, also known as niacin or niacinamide, plays an important role in the metabolic process of the central nervous system. If the human body lacks vitamin B3, it will become anxious and irritable, which will lead to emotional problems and insomnia.

You need to supplement folic acid (i.e. vitamin B9) and B12. The growth of red blood cells requires folic acid. When folic acid and B12 are deficient, the synthesis of nucleated red blood cell DNA in the bone marrow will be impaired, leading to slower red blood cell differentiation and reproduction, and the occurrence of megaloblastic anemia.

It is reported that the human body's immunity mostly depends on genetic inheritance, but many nutrients such as vitamins and minerals also play a very important role in it, such as vitamin A, vitamin C and vitamin E, and some minerals such as zinc and manganese. In addition to its antioxidant effect, it can also reduce the production of free radicals and enhance the body's immunity.

*Oral ulcers require supplementation of vitamin B and vitamin VC. VC promotes wound healing, and B vitamins maintain normal mucosal function. *Vitamin B2 is an indispensable component of the enzyme system in our body and plays a very important role in energy metabolism. It can effectively promote the regeneration of our cells.

*Vitamin C can promote the growth of children's teeth and bones. Children with low immunity may also suffer from vitamin C deficiency.

For the elderly with osteoporosis, the following methods can be tried to supplement calcium. 1. First of all, the elderly should take some calcium supplements regularly, such as some common calcium carbonate, calcium lactate, calcium gluconate and the like. In addition, some liquid calcium is better absorbed, so it is more suitable for the elderly.