This is a commonly used bioflavinoid made from plants. It has protective and stabilizing effects. I use quercetin for inflammation and especially during the allergy season which I combine it with the herb stinging nettles.
It is used in cancer therapy because of its action in tyrosine kinase inhibition ( which is a potent anti cancer strategy )
It has been used intravenously by Dr Paul Anderson in Seattle and in Mexico. It has shown to have cancer stabilization and cancer regression. It is tested on the chemo sensitivity test I utilize for cancer patients.
I would encourage every cancer patient to read Outside the Box: Cancer Therapies by Dr Mark Stengler and Dr Paul Anderson. Most of the book discusses treatments which I utilize or at least familiar with. For those patients with cancer—it will encouraging and you will learn a lot Share it with your doctor