The biggest study I've found for this (which gets reference in the OP) seems to have done a pretty good job with this[1]. Like you I'd feel much more confident

The biggest study I've found for this (which gets reference in the OP) seems to have done a pretty good job with this[1]. Like you I'd feel much more confident if we had a good understanding of the mechanism, but the effect size just seems too big. [1] https://link.springer.com/article/10.1007/s43630-021-00017-x https://link.springer.com/article/10.1007/s43630-021-00017-x