Taking advantage of the nutritional benefits of papaya is great, but too much of anything is always bad. If you overdo it, it can have a strong laxative effect and cause an upset stomach. There is no set amount, that we can tell you - just don't go too crazy. Also, if you are allergic to latex, chances are you are allergic to papaya as well. In that case, we strongly discourage you from eating any amount of papaya at all.