There are many brands of vitamin C tablets, such as Yangshengtang Natural Vitamin C, Amway Vitamin C tablets and so on. However, the average normal person can supplement the required vitamin C through diet. The food sources of vitamin C are:

Vitamin C mainly exists in vegetables and fruits, including tomatoes, bell peppers, cauliflower and various dark leafy vegetables and wild vegetables. Fruits such as jujube, hawthorn, citrus, Rosa roxburghii, Hippophae rhamnoides, lemon and kiwi fruit are rich in vitamin C. Plant seeds (cereals, beans) do not contain vitamin C, and animal foods contain almost nothing except liver, kidney and blood.

Vitamin C is easily destroyed under general cooking conditions, because its aqueous solution is unstable, heat-resistant and alkali-resistant. It is recommended that all vegetables rich in vitamin C be eaten raw as much as possible. If you want to cook, you should also follow the principle of "washing now, cutting now and frying quickly" in order to minimize the loss caused by vitamin C cooking.