This can't be fake, but vitamin C tablets can't be eaten casually. Eating too much will have side effects. It is recommended to take it under the guidance of a 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 number of applications (daily dosage 1g or above) can cause diarrhea, bright skin, headache, frequent urination (daily dosage > 600mg), nausea and vomiting, and stomach cramps.