I'm far more concerned with the way they adulterate food with this stuff than that it's available on the market. People need to use a great deal more common sense when taking any supplements or vitamins though. It makes no sense to take dozens or hundreds of times the RDA of something. One doctor had me on 50,000% RDA of B-6. I took a quarter tablet and got a headache. I kept taking less until it was just a flake before the headache wouldn't start up with it.

Vitamin E is great for some unimportant things but causes my arthritis to flare up. I don't even take it in small quantities any more but what's available on the market is usually 8X RDA.

None of this stuff is even close to being as dangerous as the Rx's. You just have to be careful with anything you add to your regimen. If it's not helping or is hurting talk to the doc about it or if it's a supplement stop it.