- **Diffusion:** Some might diffuse pennyroyal oil in the a…
- **Diffusion:** Some might diffuse pennyroyal oil in the air, although this isn't backed by solid evidence for migraine treatment. Ensure the room is well-ventilated.
- **Diffusion:** Some might diffuse pennyroyal oil in the air, although this isn't backed by solid evidence for migraine treatment. Ensure the room is well-ventilated.