Rose Scent Increases Brain Gray Matter

There is ~zero chance this is good science.

> 4.1. Limitation

> This study has three limitations. The first is the composition of the participants, that is, the participants in this study were only women.

> Relatedly, the study did not ask about the participants' lifestyle, exercise, diet, education, career, etc. These confounding factors may have influenced the brain and brain volume. Therefore, future studies should test for reproducibility when men are included and these confounding factors are controlled. The second concerns the intervention method.

> Although this study used a double-blind method, it is not that method in the original sense. This is because the participants in the experiment could easily guess that the liquid was just water from the smell they wore. Therefore, the reproducibility of the present research results should be verified by using liquids with some scent safe for the human body.

> Relatedly, this study used rose scent and no other scents. Therefore, while the results of this study indicate that rose is effective, they do not indicate that other scents are not effective.

> Participants were not monitored to see if they were wearing scent correctly. Therefore, variations in participants' adherence may have influenced the experimental results. Future research should monitor participants by requiring reports with photos etc.

It doesn't seem at all surprising that doing something you haven't done before should increase your gray matter.