So, what gives? Does it depend on the percentage of vitamin C included in the serum? And — why apples? According to Ron Robinson, cosmetic chemist and founder of BeautyStat, apples are particularly ...

8 best vitamin C serums, tested by a beauty editor - Brighten your skin and soothe redness with elixirs from Olay, Kiehl’s and Boots ...

Vitamin C is one of the most versatile and transformative products you can have in your beauty arsenal. This powerful antioxidant can decrease the appearance of dark spots, brighten and even skin tone ...

We tested the best vitamin deficiency tests from LetsGetChecked, Everlywell, and LabCorp, and our testers found them easy to use and informative. Learn more about the best vitamin deficiency tests ...

Finding the best vitamin c serum isn't always easy, so we hit up the UK's top Dermatologists and beauty experts, to find out exactly what works.

"It has hyaluronic acid, so it hydrates the skin and just leaves my skin feeling supple and soft. I've been using it for ...