I've been on this site for about eight years, and the patch vitamins come up once in awhile (esp when they first came out). They seem to work for some people, but not everyone. I've never tried them because I figured I'd be one of those they don't work for - but I've considered getting some for traveling since they're convenient and I wouldn't have to lug a bunch of pills around. Plus even if they don't work for me, a few days of low (or no) absorption won't kill me.