多大的量？2015年的一个研究有个非常有意思的结论

https://pmc.ncbi.nlm.nih.gov/articles/PMC4769668/#:~:text=Ingested%20vitamin%20C%20is%20partly,of%20calcium%20oxalate%20stone%20formation.&text=In%20a%20metabolic%20study%20in,oxalate%20excretion%20by%20about%2022%25.

In conclusion, higher total and supplemental vitamin C intakes were not associated with risk of incident kidney stones in two large cohorts of women, whereas they were associated with higher risk in a large cohort of men. Dietary vitamin C was not associated with risk in any cohort. 

简单地说，吃VC，女人不增加结石风险，但男人明显增加。