Eating vitamin C, some people will become whiter, mainly because the skin after the action of vitamin C, can reduce hyperpigmentation, can remove oxygen free radicals, can slow down the aging of cells. However, eating vitamin C also has certain side effects, is not suitable for long-term large amounts of oral intake. Normal food contains vitamin C, it can meet the needs of people, if in addition to oral intake of large amounts of vitamin C, will be prone to gastrointestinal reactions, manifested as nausea, vomiting, abdominal pain, diarrhea, acid reflux, and even serious cases can cause gastric ulcers, gastric hemorrhage. In addition, vitamin C taken orally in large amounts can induce kidney stones or bladder stones. Vitamin C is beneficial to the human body in many ways, and there are many side effects, such as affecting the human hematopoietic function, causing the destruction of human blood cells, and even affecting the development and so on.