![Covid-19 and Anosmia: A video by Petra Ratajc, PhD](https://tisserandinstitute.org/wp-content/uploads/2021/01/play-Petra-video-1080x675.png)
![Covid-19 and Anosmia: A video by Petra Ratajc, PhD](https://tisserandinstitute.org/wp-content/uploads/2021/01/play-Petra-video-1080x675.png)
![Essential Oils and the Immune System: Q&A with Dr. Petra Ratajc](https://tisserandinstitute.org/wp-content/uploads/2019/05/Petra.jpg)
Essential Oils and the Immune System: Q&A with Dr. Petra Ratajc
Do essential oils influence our immune system directly? Dr. Ratajc answered this question during her Essential Oil Kinetics Masterclass in April 2020, and we thought you might find her answer interesting. Please note that this is related to physiological effects...![What Is Aromatherapy? The Dividing Lines Between Feel-Good and Medicine](https://tisserandinstitute.org/wp-content/uploads/2019/05/dreamstime_m_31345666.jpg)