"The very first animal data presented showed the mice having a weight loss, and that's often a tipoff," he said.

I agree that we can't always jump from animal data to humans.

We can use animal data to allay anxiety in certain instances.

Several scientists at the drug agency, asking to remain anonymous, said there was a way to make a better risk assessments based on animal data.

For many of these carcinogens, the animal data preceded human confirmation, in some instances by decades.

And, he said, some animal data indicate that polyunsaturated fat may even increase cancer risk.

But based on animal data, researchers emphasize that parthenotes are not true embryos.

Much of the animal data suggests that the earlier hypothermia is induced the better the subject's outcome.

Most human health and environmental risk estimates are based solely on animal data.

Dr. Stark, for example, said such estimates are partly based on animal data.