Hi
I'm just learning about it as I've adopted a rescue cat with gingivitis.
The rescue put him on raw food (look for the thread on raw food gingivitis and our possible new arrival for lots of help and advice from the lovely Purrs members) which literally saved his life.
I've also, with the approval of my vet, put him on a aloe vera juice which gets mixed into his food. The juice helps keep down the inflammation.
I'm a distributor for the company so this isn't really the place to promote product but if you want to know more please PM me.