Different from carbohydrates, fats, protein, water and other nutrients, vitamin deficiency or improper absorption and utilization by human body will lead to specific deficiency or syndrome. If the human body lacks vitamin A, it will cause eye diseases, digestive tract and genitourinary system diseases, and even affect normal development; Lack of vitamin B family, such as vitamin B 1 in human body, will affect the normal progress of glucose metabolism, lead to the disorder of energy supply in nerve tissue, and cause polyneuritis (beriberi); Lack of vitamin B2 can lead to various skin inflammations; Without vitamin D, children will suffer from rickets and adults will suffer from osteomalacia. ...
Vitamins can be divided into therapeutic vitamins and nutritional supplements according to their uses. Vitamins for treatment should be selected according to the deficiency. Generally, a single variety is used, and what is lacking should be supplemented, and the dosage should have therapeutic effect. For example, vitamin A is used to treat night blindness; Vitamin B 1 is used to treat beriberi; Nicotinic acid is used to treat pellagra; Vitamin c is used to treat scurvy; Vitamin d is used to treat rickets. Various vitamins play an important role in these aspects. Therefore, we must take enough vitamins every day to meet the needs of the human body, thus preventing the occurrence of various diseases.
Except for vitamin D, all vitamins cannot be synthesized in the body and must be supplied by food. The food sources of vitamins are more extensive than those of minerals. It exists in almost all animal and plant foods, such as vegetables, fruits, food crops, fungi and animal livers. And if you eat a lot of these foods, you don't have to worry about excessive poisoning. However, it is worth noting that vitamins in food are easily lost with processing and transportation. When using vitamin pharmaceutical preparations, we should pay attention to the safe dosage so as not to cause unnecessary physical harm.