This article uses the trick where you pick studies that support your argument and ignore all of the studies that disagree with it. There are other studies where Dextromethorphan improves both objective and subjective measures of coughing: https://pubmed.ncbi.nlm.nih.gov/37232330/ They also picked a study that shows honey outperforming Dextromethorphan but ignored all the studies that show honey performing similarly o…
> There are so many studies and papers published now that you can find both positive and negative results for just about anything. Doesn’t that suggest that the effect overall is neutral?
Also, the very claim that there are positive and negative studies for everything is handwavy nonsense. There might 100 studies, all of which agree except for one outlier ... what does that "suggest" to you?