Should i add a antioxidant serum to my skin care regimen? what health benefits would that have?

Skin protection: I feel the most important steps in good skincare are exfoliation, collagen stimulation and sun protection. Some antioxidants stimulate collagen. I also like the idea of a topical antioxidant because it is good for protecting the skin from environmental damage over time. So you probably won't see dramatic improvement in a short period of time, but you will see less sun damage and less skin cancer.