Cod

Cod is notable for histamine. Clear on FODMAPs, lactose, gluten, fructose, oligosaccharides, sorbitol, sucrose, tyramine, salicylate, nickel and oxalates.

Cod contains only low levels of histamine. Cod is a lean white fish, low in the free histidine that bacteria turn into histamine - unlike tuna, mackerel and sardine, where the scombroid problem lives. It is sold as loins and fillets, a large share of it frozen at sea — and frozen at sea is the shortest clock there is. Freshness is the whole of it: the count climbs with every hour out of the cold, and no label records it. Amounts vary by brand and recipe, so always check the label of the exact product.