When tested in animals at high doses, natural and man-made chemicals are about equally likely to show up as cancer-causing.
Scientific Claim
Natural and synthetic chemicals are equally likely to test positive in animal cancer tests.
Original Statement
“We conclude that natural and synthetic chemicals are equally likely to be positive in animal cancer tests.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The claim is presented as a conclusion based on animal test outcomes. It does not claim human relevance or causation, only comparative likelihood in animal tests.
Evidence from Studies
Supporting (1)
Unknown Title
The study found that about half of the natural chemicals in our food cause cancer in rats when tested at high doses, just like many man-made chemicals do — so neither is more likely to show up as a cancer-causer in these tests.