Thousands of Amazon shoppers and a PEOPLE editor’s 56-year-old mom swear by the $35 Vichy Vitamin C Serum. This serum ...

Vitamin C has long been a staple ... regularly tells me how much he 'loves' my skin, that my skin is so great." "Both my husband and I are using this serum," a pleased Amazon shopper wrote.

As someone with a fairly minimal skin-care routine, it’s difficult to convince me ... serum. That’s why it’s important to find the right formulation — one that makes vitamin C as stable ...