I hope I never have to find out if dandelion root kills cancer, personally, but I can tell you for sure, it fixes acid reflux. I used to take two 150mg Zantacs, or 1 Prilosec, a day, for years for it. For the past year, I have been taking 2 dandelion root capsules a day, and only have a very rare (once a month) flareup of heartburn.