Caraway seeds
Mustard seed
May contain traces of gluten, individual tolerance.
Caution
May cause symptoms in more sensitive people. Track your own reaction.
Mustard seed itself is low in histamine. However, processed mustards (eg Dijon) may contain other ingredients and be fermented, which increases the histamine content. Individual tolerance is required.
Safer alternatives
Suitable
Basil (fresh)
Bay leaf