When I was a kid my dad grew comfrey leaves and we only used the leaves and put it in salads, but I read yesterday 7/12/2013 that it isn't good for you. Is that true? My dad lived to be 85 and never had arthritis and neither do I and I'm 63. The leaves were a little rough on one side and my mom chopped it up real fine and you didn't even know it was in the salad and we had salad every night but we were not vegetarians. I don't know where to buy it.