Skin type: all | Key ingredients: ferulic acid, vitamin E, vitamin C NBC Select associate reporter Bianca Alvarez is a huge fan of this serum, which she says has a creamy, lotion-like consistency ...

Other types of vitamin C — such as 3-O-ethyl ... this unstable ingredient is best used quickly. “Many worthy topical vitamin C-containing serums will often be combined with ferulic acid ...

In general all hair types can benefit from vitamin C, but it may be especially helpful for those with hair that is dull or susceptible to breakage. How often can you use it: As a topical treatment ...

"Despite advertising claims, almost all available topical formulations contain ... actually prevent further damage: selenium, vitamin E, and vitamin C." Antioxidants are known to prevent agents ...