I have had bad skin my entire life. It was obvious I was never going to "grow" out of it as I had hoped for so long. I tried Retin-A, glycolic acid, tetracycline.... everything over the counter... every natural remedy I read about... and finally tried B5 last year at the age of 32. All I can say is it has changed my life because for the first time in my life I have consistently clear skin. Sure, I have to take the supplement every day (I tried going off it and the zits came back), but it's worth it. And it doesn't only work on your face. It cleared my back and chest, too.
Maybe I just got lucky. I don't personally know anyone else who's done it. It worked for me.