Study: Testosterone Administration Induces A Red Shift in Democrats

TL;DR:
- Weakly affiliated Democrats had higher natural testosterone levels than strongly affiliated democrats (lower testosterone = more Left-Wing).
- Receiving testosterone treatment made weakly affiliated Democrats more supportive of Republicans (higher testosterone = more Right-Wing).
- The treatment also improved their overall mood.
- "No effects" were found for testosterone treatment in strongly affiliated Democrats (not sure what the study meant by this tbh - maybe that treatment didn't alter political alignment).

Study concludes: "Our findings provide evidence that neuroactive hormones affect political preferences."

Source: https://www.openicpsr.org/openicpsr/project/155441/version/V1/view