But remember that it competed at first with the old procedure, which had proven its safety.

"Fish-oil supplements need studies to prove their safety and efficacy," he said.

If the company fails to prove their safety, the commission threatened to close them.

To prove the fiber's safety, Monsanto conducted a series of animal studies beginning in 1983.

Abbott then told the agency that it would soon file the more detailed application and studies to prove Synthroid's safety.

Additionally, flasks were heated to temperatures of over 800 C to prove its safety in a fire.

But environmentalists argue that there is no evidence proving the altered foods' long-term safety.

So the company undertook a study of Ketek in 24,000 patients to prove its safety.

No ordinary food has ever been required to undergo scientific analysis to prove its safety.

Further studies are required to prove its safety and confirm its effectiveness.