Vitamin c should not be eaten casually. Eating too much has side effects. It is recommended to take it under the guidance of a regular doctor.

1. Taking 2 ~ 3g daily for a long time can cause scurvy after stopping taking the medicine.

2. Taking a large amount of vitamin C for a long time will cause urate, cysteine or oxalate stones.

3. A large amount of vitamin C (above 1g per day) can cause diarrhea, bright skin, headache, frequent urination (above 600mg per day), nausea and vomiting, and stomach cramps.

The price of food supplement is safe, and jujube, kiwi fruit and vegetables all contain enough vitamin C.