Inspired by smaller [platelet-rich plasma] studies conducted in Europe and in California, Dr. Rosen began a pilot study in 2019 before COVID hit. For the treatments, blood is drawn from the patient and the platelets containing growth factors are isolated. The platelets are then placed on a small sponge which is inserted in the nose. “It is a way for the blood product to get in contact with the lining of the olfactory neurons that are high in the nose,” says Dr. Rosen. “What you’re trying to do is regenerate more of the olfactory neurons. You’re trying to tell the body that there has been some damage, and it’s time to repair it.”

— Read more in There’s New Research That May Offer Hope for People Who Have Lost Their Sense of Smell at Well + Good.