I am on my 2nd week of nightshades/solanine free diet. I read that blueberries, okra and paprika have small amounts of solanine so I avoid them too.

My question is - how long do you know that you have allergies to nightshades/solanine? Would you know the effect instantly after eating just like other food allergies e.g. shrimp, peanuts, etc.? Or does the effects only show several days after eating?

Thank you.