"Stop Using Zicam"

This will hardly make you reassured in the oversight of things-sold-to-put-into-your-body:

Because Matrixx has called Zicam a homeopathic product, the company was not required to seek agency approval before selling it.

In other words, to avoid scientific scrutiny of your product, you need merely label it as made using a process with no scientific validity.

Lovely. In a just world, these people who lose their sense of smell ought to be able to sue Congress for passage of the Dietary Supplement Health and Education Act of 1994, a truly atrocious piece of legislation.

One good note: Wikipedia says "In the United States, homeopathy is much less common, and the percentage of people seeking homeopathic treatment declined from 3.4% in 1997 to 1.7% in 2002."