Vitamin C is a water-soluble vitamin and can be taken at any time as needed. If the daily use of vitamin C is used for the prevention of scurvy, or for the adjuvant treatment of purpura, you can take vitamin C granules or vitamin C tablets under the guidance of the doctor, generally any time to take can be. In addition, when taking vitamin C to their own lack of judgment, not long-term blind supplementation, long-term use of large amounts of vitamin C, may cause urate, cysteine salt and oxalate crystals. Patients overdose, may also cause diarrhea, headache, nausea, vomiting and other physical discomfort. Generally, the human body can obtain vitamin C from daily food. It is recommended to choose some green leafy vegetables and fruits, etc., such as spinach, oranges, kiwis, etc. in life.