Then new research has proven that [...]
This exact phrase is one of the problems when used incorrectly. Research doesn't really prove, it suggests. Especially a single study. A single study especially when studying humans proves virtually nothing as the sample sizes are usually insufficient and methodologies are often questionable since you can't easily remove additional factors to demonstrate correlation or causation with certainty. Something can be viewed as proven only after it has been substantiated by piles (technical term) of studies with varying methodologies and so on. It surely doesn't happen overnight.
Generally speaking, real experts are cautious about making big claims with absolute certainty just list Bertrand Russel noticed.