Bought this originally at a Natural Grocer in Woodbridge, Virginia after a four day hospitalization for diverticulitis. Doctors had emphasized that there was nothing I could do to prevent recurrence and I was devastated. I began taking one dropperful twice daily for 2-3 days whenever symptoms presented. It has saved me thousands of dollars in ER and hospital expenses, and spared me hours of agonizing symptoms. I also found colloidal silver very effective on burns, Athletes foot, cuts and scratches, eye problems, mouth ulcers, sore throat,ear infection, and nasal symptoms. It s a staple in our medicine cabinet and we ve given many bottles to friends who were suffering from various ailments. Thank you for a quality product.