I write about skincare quite a bit for my day job, so when I got Jessica DeFino's newsletter a few weeks ago, I stopped dead in my tracks. I realized how many times I've written copy along the lines of "yes, it actually works"...and the thing is, shouldn't all skincare? The sad reality is that a lot of it doesn't—or at least, it doesn't produce the results you're looking for. Again, I don't tell you about most of the products I receive for free, but when I find something that, yes, actually…