Being safe while growing and eating rare fruits

[cassowary]

It’s a good question. I have several fruits that there is very limited information online. I recently got seeds from Jim West who has an incredible collection of rare fruits. There’s stuff there that only has a botanical description.
I’m often warning people about the oxalic acid in sour carombola. Here in CR it’s common to make a juice drink with sour carombola that will inhibit your body’s ability to absorb calcium. That’s a well known thing that many are unaware of. 
Peter

Good addition Peter,
A friend of mine did exactly that, juiced heaps of his Gigant carambola, he said he got knocked out afterwards, like slept 5h during mid day.
I still eat some ripe ones, but wouldn't juice them.
Sweet leaf shouldn't be juiced either.

Easing in to a new fruit is good, take small steps, thats what I do with jungle fruits, put some on my hand and look for rash, then I do wrist (thinner skin), then some on my lips and so fort. But only a tiny taste if the other tests are ok. It takes months before I trust enough to eat them freely.

[Galatians522]

Galatians read the study and ill attach his post. Basically the amount of annonacin in atemoya is very low compared to paw paw. Custard apple i have not seen a measurement for but the amount is probably similar to atemoya.

Har also pointed out that the people in the study were also consuming the seeds by blending them into smoothies and were drinking the bark and leaves via teas. These parts of the fruit have much more annonacin than the flesh.

The island the people lived on was heavily sprayed with agri chemicals. The annona consumption might not have even been the factor

Finally, all plants have toxins to some extent. Oxalates, phytates, etc. yet plants are the healthiest foods on the planet. This is probably just another case of trying to demonize plants.

I have a san pablo red custard apple tree that currently doesnt set fruit. For a lot of these tropical fruit trees, 2 trees are needed for pollination. Based on what im saying above, i feel comfortable planting a second custard apple tree. I may or may not freeze the fruit, but i will probably eat plenty when its in season..sure, the annonacin is still in the back of my mind, but the hazards produced by humans are a lot more dangerous than what is found in nature, in my opinion

I've bookmarked the topic - It's interesting reading material.
I'd just like to add the table that Galatians is referring to in the image you attached:

Thank you both for looking that up and attaching it here. Math is a beautiful thing.

[barath]

Galatians read the study and ill attach his post. Basically the amount of annonacin in atemoya is very low compared to paw paw. Custard apple i have not seen a measurement for but the amount is probably similar to atemoya.

Har also pointed out that the people in the study were also consuming the seeds by blending them into smoothies and were drinking the bark and leaves via teas. These parts of the fruit have much more annonacin than the flesh.

The island the people lived on was heavily sprayed with agri chemicals. The annona consumption might not have even been the factor

Finally, all plants have toxins to some extent. Oxalates, phytates, etc. yet plants are the healthiest foods on the planet. This is probably just another case of trying to demonize plants.

I have a san pablo red custard apple tree that currently doesnt set fruit. For a lot of these tropical fruit trees, 2 trees are needed for pollination. Based on what im saying above, i feel comfortable planting a second custard apple tree. I may or may not freeze the fruit, but i will probably eat plenty when its in season..sure, the annonacin is still in the back of my mind, but the hazards produced by humans are a lot more dangerous than what is found in nature, in my opinion

I've bookmarked the topic - It's interesting reading material.
I'd just like to add the table that Galatians is referring to in the image you attached:

Does anyone know if there's data on the amount of annonacin / acetogenins in Ilama pulp?

[Rob From Sydney]

Just what I was thinking regarding the ilama.
Even better - is there an indicator of higher annonacin content in annonacae fruits?