Comment by krona

> insufficient evidence

That's a very high standard of evidence.

Toxicity testing is often carried out on mice, up to the dosage required for any observable effect. From that safe levels for humans are derived, e.g. the NOAEL (No Observed Adverse Effect Level).

To say that a study done in humans, got observable effects at only twice the intended dose (who knows what the s.d. of the dose is, but anyway) and we conclude there's simply not enough evidence?

Many chemicals have been banned on the basis of far less evidence.