So a scientific study by a reputable company is not enough to say proven safe? 🙄
Tested safe?
Proof requires sufficient verifiable evidence to support the conclusion.
Proof also requires the absence of verifiable evidence to the contrary.
Studies don't do that. They provide data, methodologies, procedures, results, conclusions and recommendations.
Whoever has the authority to make the final decision as to safety must weigh all studies, data, and results individually and in aggregate. Only then is there enough "proof" in the opinion of that person/persons to conclude it is safe or not, or that it may be used in limited situations and circumstances, or avoided in other situations and circumstances.
One study is not "proof" of anything other than a study was completed.