I pretty much take snuff all day now as it has all but replaced my cigarette habit. I’ve noticed I’ve steadily increased the amount and frequency of my nicotine dose (over the last 6 months or so) without any noticeable effects on the schnazola. I breathe much better and the sinuses are more open than they have ever been. I have no idea how much snuff I use a day, but my use is frequent (several times an hour, much more than when I smoked) and steady, just the way I like it, 