For people who spend hours on Reddit's Skincare Addiction thread, and who are really into ingredients and formulations, The Ordinary 100% Niacinamide Powder (£5) offers what is probably an exciting opportunity to DIY your own serum. For people who don't want to faff around and simply want to slap on your skincare and go, this powder is definitely not for you.
If you're still reading and haven't kept scrolling, then you already know the inflammation-reducing, tone-evening, line-smoothing benefits of niacinamide. Comprised of niacinamide and zinc, this powder allows you to personalise any "non-conflicting serum" (which, according to the brand are water-based serums or creams with a pH between 5.0 and 7.0), based on personal preference. Just combine a quarter scoop of the provided spoon with your serum or cream, mix it in the palm of your hand, and apply as usual.