Vitabrid C12 Face Brightening Powder ($60; barneys.com) is a mixable, potent anti aging and brightening booster that delivers 12 hours of transdermal Vitamin C. Its one that can be mixed with water or with any skincare product like serums, moisturizers or oils to boost skin’s radiance. I like to mix it in with serums, or anything that goes in as the first step of skincare. There's a small scooper that comes with the product and I take one scoop of product in that to mix in with my skincare. I like to use this as part of my night time routine and follow up with a sunscreen the next day since it does leave skin a tad more sensitive. I love how bright and firm it leaves skin feeling and how very effective this one is just after a week’s use. I do have dry sensitive skin, so I skip a day or two of using it, but if you don't have very sensitive skin, Vitabrid recommends twice a day usage. I really like the idea of a mixable powder since it gives me the flexibility to use it when/how much I want depending on how my skin feels on that day. Overall, a very effective, powerful Vitamin C addition to your skincare routine, if you are looking to add some radiance boost and even out your complexion without dryness.