Did you read this paper? Do you really think this is good evidence for the claim? I'd love to hear why.

I could give a fulsome critique of it but I think the simpler thing to say just to kick this off is that I could give you a PubMed cite to back basically any claim, true or otherwise.

You really need a large volume of repeated results by different groups doing the experiment/research so you get the proper regression to the mean. Individual papers are more important at saying "here is something interesting that others should also check out".