A friend told me that she has far less arthritis pain, when she avoids nightshades. They contain solanine, which seems to be the culprit. Since I have arthritis in my hip, I gave it a shot. After a month of completely eliminating all nightshades from diet, the arthritis pain was gone. I gradually tried one nightshade at a time. Tomatoes, especially cooked ones were a problem, as were potatoes. I haven't really bothered trying some that I don't particularly like in any case, like eggplant.
I found that hot peppers don't bother me. I thought about the solanine and I know that most of the solanine in potatoes is in the skin, as well as any green bits. I quit eating any potato skins and found that moderate amounts of potato don't bother me anymore. I thought about the tomatoes. I had noticed that sun dried tomatoes didn't bother me and they didn't have any seeds. I wondered if maybe the seeds had the most solanine, since the solanine is in the plants to prevent being eaten by insects and the seeds are the most important part, to the tomato. I have been eating some raw tomato, with all the seeds taken out, and that doesn't bother me. Next experiment is to see if cooked tomato with no seeds are okay.
May you live as long as you wish and love as long as you live.
Robert A. Heinlein