Hyaluronic acid is my jam, it’s just gurrrrrl, it has my back. But having it mixed with vitamin c can backfire a bit- I get drier through the day, so vit c working as time goes on means my skin looks a bit drier than normal after it was so moist and happy in the morning, I think? I dontknow. Vit c matters but I have to be careful with it so I like my vit c to be separate. May be better for folks with younger skin or skin which isn’t sensitive