In Ayurveda, snehana nasya, or oiling of the nasal passages, has been used for thousands of years to prevent and treat many causes of physical and mental imbalance. In these times of covid-19 (and in a world now literally awash with air-, water-, and earth-borne toxins and stresses), snehana nasya has perhaps never been so important. Noted Ayurveda practitioner Dr Susie Colles writes…