Phenomenal life changing product! For the last 30 years, I have been plagued with canker sores, nearly one following another. I went to specialists at Mayo Clinic, tried all sorts of medications, even burning with silver nitrate. I started taking this product 2 years ago, and since then have probably had 3-4 hot spots, and 1-2 full canker sores, of which lasted a day or two versus the normal 1-2 weeks. This product has changed my quality of life drastically!