@SarahGen-- That's niacinamide. I know because my grandmother takes it. She's eighty and she had been very sharp until a few years ago when she started forgetting things a lot. Then she starting taking naicinamide and it made a huge difference. We always known when she has forgotten to take it because she keeps asking where she put things. And we remind her to take her supplements. Niacinamide is said to be great for skin too but I have no idea as I've never tried it.