Vitamin C chewable tablets can also be taken on an empty stomach, but vitamin C may be irritating to the gastrointestinal mucosa if taken on an empty stomach, which may lead to nausea, acid reflux and other symptoms, and in severe cases may even lead to inflammation and ulceration of the mucosa, therefore, it is best to take vitamin C chewable tablets with a meal. Vitamin C is used to prevent and treat, scurvy due to vitamin C deficiency, or in patients with immunodeficiency severe infections. In addition, vitamin C can help improve immunity and also promote the absorption of iron. In patients taking iron supplements for iron deficiency anemia, vitamin C can also be used at the same time to help promote the absorption and utilization of iron. However, vitamin C should not be taken in excess for a long time, otherwise it may lead to an increased risk of diseases such as urinary tract stones.