When a product is as expensive as SkinCeuticals Vitamin C serum, there are always going to be duplicates waiting in the wings, waiting for you to try them. The tricky thing is finding out which dupe is actually worth your money—the last thing you want to do is spend money on a bunch of duplicates that don’t work. You might even end up spending as much as the real thing would have cost in the first place.

The holy grail of vitamin C serums has to be SkinCeuticals C E Ferulic—but it comes at a crazy high price point. Many companies make similar products because SkinCeuticals is kind enough to spell out the key aspects of its patented formula: 15% vitamin C (in the form of L-Ascorbic acid), 1% vitamin E (in the form of alpha tocopherol), and 0.5% ferulic acid. SkinCeuticals’s serum includes this specific combination of active ingredients because research has shown that these ingredients make…

My mom enjoys Korean dramas, Sudoku puzzles, and extracting blackheads. That’s right, those annoying little black dots that appear when your pores get clogged but stay open. When I was a teenager, I had acne on my back (“bacne”), so my mom used to beg me to let her squeeze out my blackheads. She was excited for me when I got into college, she was happy when I made her favorite scones, but I don’t think I’ve ever seen her more delighted than when I grudgingly agreed…