Comment by gizmo686

Research papers are not literature reviews. This paper reports on the results of this study. And that study only investigated what it investigated.

In the case of public health, there are a bunch of organizations that keep on top of the research and maintain a more comprehensive view of their perception of the current consensus.

For day to day guidance, individuals should be referring to either those sources, or healthcare professionals.

If people are looking at individual studies like this to make decisions, something has gone very wrong.