Niacinamide Powder.

"The Ordinary powders, the ascorbic acid powder and the Niacinamide Powder, these went mad [...] when they launched, they were new, they were innovative, they were different, and then quite quickly people realized they're just very complicated. You have to mix the powder in with another product, you have to use the right amount, you still don't really know what strength and concentration you're creating. [...] It quickly became a little bit too much effort. They got everywhere with that powder and whatever you did it never really merged with your skin well enough, so it was a little bit on the gritty side. [...] The biggest issue was the scoop. The Ordinary recommended you use a quarter of the scoop that they provided, why not just provide a scoop that was a quarter of the size? [...] People didn't really know what strength they were using. It was a bit of a hot mess. I'm not surprised that these have been phased out."

"The Ordinary Niacinamide Powder—I bought the hype when this came out. I thought it was amazing and I used it for months and then almost a year. It made my skin irritated, it made my skin burn. We've got an entire video of that debacle, and it was so difficult for me because I expected better from The Ordinary. I was excited about the brand, and I realized I was a victim of consumer marketing. Just the way your best friend can disappoint you, there can be products from a favorite brand that do not do your skin justice. The reason that The Ordinary launched some of their powdered formulas like the vitamin C is because vitamin C is unstable—you can mix it yourself, you know, kind of have a little fun with it. However, the Niacinamide Powder is stable. There's no reason it irritated my skin, but it irritates most people's skin. You shouldn't be using niacinamide at 100 percent, and most of the efficacy we see in formulations that are two to ten percent. Why do overkill? This one is a hard pass, even if it is on sale."