I can't tell if the capsules help my canker sores or not. I do know that the CankerRid does help. I rely on CankerRid every time I get a canker sore. I take the Propolis capsules at the recommendation of Durham Bee Farm trusting that it will make a difference in how often I get canker sores and how long they will last. So, I'm taking the Propolis Capsules on blind faith that they will have an effect. Thank you, Richard