VC can be tested. I took VC for a while and it worked. I think my skin is elastic. Hehe, VC can help absorb iron and collagen! ! Girls in the physiological period can eat more VC, but don't eat it. It's a very cheap bottle. Just a few dollars or choose health care products! ! ! In addition, when buying VC, choosing natural VC to synthesize VC is not very effective. As far as I know, Hainan Yangshengtang (not Shanghai Yangshengtang 0) and Amway are a mixture of natural VC and compound VC, but the proportion of natural VC is very small, but Amway has a higher cost performance than Yangshengtang! It's just that each tablet is cheaper on average.