I’ve used the stronger 21.5 version of this for 2 years and only now thought I’d give this one a try. I wish I tried this earlier.

Honestly, to me the results from this are the same as 21.5. Vitamin C works over time/uses but usually you can see some improvement the next day or after a few days of using this, and I saw the same amount of change in a few days as when I used 21.5.

Even better, 21.5 stings and sometimes I think because it’s a bit more irritating I can sometimes wake up with some new whiteheads. This one doesn’t sting at all (unless I’ve used it too soon after exfoliating which is something you shouldn’t do and my fault, not the product) and isn’t stickier than the 21.5 which is what is usually claimed by both the brand and reviewers. Yes, it is a bit sticky when you first put it on, but same as the 21.5, it dries down matte after about 5 minutes.