Ohh, that's a new one to us but after searching for it, we found it's also called "gravioloa" "corossol" or "soursop. After doing a search, my own personal red flags came up because 1) the first few pages of search results were for companies selling it, and 2) I couldn't find mention of any reputable studies or anecdotal evidence for this supplement by members of the veterinary or human medical community.

But after digging a little deeper, here's some legitimate information we found from The Dog Cancer Vet, Dr. Demian Dressler, who says:

Graviola Not Recommended For Dog Cancer

Graviola (Annona muricata) is a tropical tree that has been touted as a useful cancer supplement. It is also called corossol or soursop. Graviola does have medical potential and is used as a medicine in certain parts of the world. The fruit is also commonly eaten.

The problem is that Graviola contains both medical compounds and substances that, when taken over long periods, may be toxic.

It is true that there are some interesting molecules in the tree, bark, fruit and leaves that show some limited evidence for being active against cancers.

Read the rest of the blog post here on his Dog Cancer blog

As always, we urge anyone looking into alternative medicine like this to work with a holistic veterinarian, to help decipher fact from fiction. It's hard to do it on our own, there's so much stuff out there.

Hope this helps!