Whether vitamin C can be taken for a long period of time depends on which type of vitamin C. If it is medicinal, long-term use is generally not recommended; if it is a nutraceutical, it can be taken for a long period of time under a doctor’s supervision, but care should be taken not to exceed the prescribed daily intake. As a medicine, vitamin C is used in the treatment of scurvy and as an aid in the treatment of various acute and chronic infectious diseases. Deficiency of vitamin C may result in symptoms such as bleeding gums, depression, and decreased immunity. However, it should be noted that long-term use of vitamin C may cause urate and oxalate stones. If taken in excess, symptoms such as diarrhea, headache, frequent urination and nausea may also occur. As a health product, it can play a role in supplementing vitamin C for the body, and moderate intake has certain benefits for the health of the organism. However, it cannot replace drugs, and should not exceed the recommended amount or be consumed at the same time with similar nutrient supplements. If you need to take vitamin C drugs or health products, it is recommended to take under the guidance of a doctor, it is best not to blindly supplement their own, to avoid the therapeutic effect can not be achieved, and will even affect health. Daily attention to diet, eat some oranges, lemons, grapefruit, fresh dates and other fresh fruits and vegetables, supplement vitamin C intake.