Journalists, can publish reports on studies that are promising, that support theories, that report research in progress, that detail expected potential, when they are not yet proven. Sometimes this can be for sake of space, for the sake of reasonable doubt, or due to a promising outcome. Very often the general public,are unaware of the scientific method, and the distinction between a theory, a discovery and a fact. So the report may be taken as fact. I have tried to put relevant details in clips, and for the sake of space have not included the qualifications, but science is a constant process of evaluation, in which for something to be classified as a fact it must be proven beyond all doubt, with a testing method that can be repeated. Often studies are on the verge of doing just that. But the conclusions are not yet facts. Peer review where reports are checked by relevant experts, is a way of third party validation, where principles can be verified. But....Always do your own research.