- Histamine is naturally occurring in many foods, and all seafood has some level of naturally occurring histamine. Some fish species are naturally lower in histamine, while others are naturally higher. - Most people tolerate normal histamine levels, however some with histamine sensitivity do not. Some people with histamine sensitivity choose to avoid foods with moderate or high levels of naturally occurring histamine, such as aged cheeses, processed meats, and fermented foods. - Proper seafood handling is necessary to prevent histamine levels from rising above acceptable limits. Vital Choice and its seafood processors have procedures in place for maintaining normal histamine levels. While on board the fishing vessel, our seafood is held under constant refrigeration, or it’s iced or frozen. It is never held at ambient temperature on board or during transport.