Chia seeds
Pecans
Caution
May cause symptoms in more sensitive people. Track your own reaction.
Pecans are less problematic than walnuts, but still contain biogenic amines and can be slightly histamine-releasing. Individual tolerance varies. (SIGHS)
Safer alternatives
Suitable
Chestnuts
Chufa / tiger nut
Not a nut but a tuber; roasted versions are less suitable according to SIGHI.