In eating salmon for omega3, I eat capers horseradishes. Some concerns are whether capers horseradishes cause gut leaking?
Neither capers or horseradishes are nightshades. Capers are Capparaceae family, in the order Brassicales which includes the Brassiceae family members such as cabbage, broccoli, and horseradish. Some people seem to react to the members of this plant family as noted here http://paleohacks.com/questions/1158/paleo-diet-and-severe-stomach-aches-cramping#axzz1HBu1bdNA Might be worth checking out and trying an elimination diet. Both plants are pretty high in some volatile plant oils, so you might react more to them than other group members.
Do you still take Fish Oil? 12 Answers