No, it's not a barrier to trade at all.
On the contrary, it puts in place a trade that is much more at the service of the population and that takes into account factors other than immediate profit. Both are important. It provides the public with health and safety. These are fundamental things.
If the precautionary principle is not applied, the damage is often irreversible, and it is too late to back off. The whole spirit of the precautionary principle is indeed a fundamental principle that Canada should support in the fight against it. We know from the CETA Regulatory Cooperation Forum in Europe that it is fighting this precautionary principle.