I've used this every day for the last three months and have noticed a huge improvement in the lines in my forehead and between my eyebrows. My skin feels and looks healthier! I just wish there was a good way to get all the remaining cream out of the bottle that can't be sucked up with the pump. (I use a little brush to try to make use of every last bit!)

I'm confused by this product. I've always loved Skinceuticals CE Ferulic but it oxidizes before the month is up so I wanted to try something that uses a more stable formulation than L-ascorbic acid. So why does it chap my skin so badly? I am now down to just putting tiny drops on crows feet, around mouth and on a sun spot, but I don't think I'll get much benefit this way. Curious as to what others think about this. It's worse than retinol chap-wise, except that it doesn't hurt the way that overuse of retinol does -- no splits at lip corners or nostrils etc. Why would a chapped face be a great end-goal? On the plus side, it smells nice and is in a much better bottle for protection of vitamin C.

I like Peter Thomas Roth’s products. I have only used this Potent-C Powder Serum for a short time. It’s hard to give a review. I have to give all products time to work; however, I like the consistency, and it goes on well. Easy to apply wand.

Totally changed the texture of my skin. I’ve been using for about 3 months now. The dark spots on my forehead and cheeks are fading and the fine lines on my forehead are less noticeable. A little product goes a long way- so one bottle will last you awhile. Will 100% be purchasing a second bottle!