hyper-C serum

Like the following reviewer, I too was buying a similar serum that was about 3 times the price of this. The beauty of this product is that it is relatively fast working, Cellex-C took ages to have...

I was using the Cellex-C serum for sensitive skin and saw little results. I was at Ulta and saw the Jason serum had vitamin C ester which is supposed to be better than the vitamin C in the Cellex-C...