Vitamin C, vitamin E and vitamin B can not be taken for a long time, only in the state of deficiency need to supplement, supplementation should be stopped after a period of time, to avoid oversupplementation of harmful effects on the human body.
1. Vitamin C: If you take a large amount of vitamin C for a long time, it may increase the excretion of oxalate in the urine, which will increase the risk of urinary tract stones.
2. Vitamin E: If you take too much vitamin E over a long period of time, you may experience nausea, vomiting, dizziness, headache, blurred vision, chapped skin, lipitis, xerostomia, diarrhea, enlarged mammary glands, fatigue and other symptoms.
3. Vitamin B: Vitamin B may cause irritability, fatigue, loss of appetite and other symptoms when taken for a long time or in large doses.
It should be noted that the general population can obtain vitamin C, vitamin E and vitamin B in their daily food, unless there is a vitamin deficiency, it is not recommended to take vitamin supplements. Vitamin deficient people also need to be supplemented under the guidance of a doctor to avoid long-term oversupplementation of vitamins and jeopardize human health.