I saw only a couple people mention it in the 6 must-have items. Before I got obsessed with handbags, I was way into skincare. I really recommend that everyone use a vitamin c serum, especially those of you in your late 20s and up. It does wonders for your skin. It is also known as L-ascorbic acid and it is an antioxidant that "helps protect against damaging UVA/UVB rays, prevents premature signs of aging, and stimulates collagen production." There are various brands. I can make some suggestions if anyone is interested. It is not cheap but a small 1 oz should last for about 6 months.