No because giving people health products which haven't been specifically shown to be safe or effective allows unwarranted quackery products to overflow the alternative health industry. /duh
If something is shown to be quackery then the FDA can find ways to pull it off the market. They have done this enough times for things that were already proven safe and effective so they should have no problems doing this with quack medicines. unfortunately they do not do this with quack and deadly pharmaceutical drugs. Why? Because the FDA is in bed with the pharmaceutical companies and according to the ex-commissioner for the FDA Herbert Ley, the FDA officials are given high level job positions within these companies and other rewards for protecting the profits of the pharmaceutical companies. Along the same lines it has also been reported for over 4 decades that there are numerous FDA officials that own stock in the pharmaceutical companies they over see in violation of insider trading laws. So anyone thinking that the NDI regulations are being pushed for safety reasons are just fooling themselves.
The nutritional industry already has GMP standards in place for safety that in my opinion already exceed the standards required for many pharmaceutical companies.