Pellitory or pyrethrum root (Bertram) was taught by Hildegard von Bingen, the German mystic and herbalist, to be the best herb to prevent yeasts, viruses and parasites and fungus and for the assimilation of nutrients (3rd letter of wellness in my book Leaf to Life).
It promotes circulation from top to toe, especially the head. This is promising for the prevention of dementia, poor memory and Alzheimer’s disease. As our population ages, it is a timely herb to rejuvenate our brain and overall immunity. It has been found to be useful for HIV patients, malaria and dengue.
I often used it in the form of a 99% pure extract of the herb to be taken after each meal.