Antihistamines are designed to prevent histamines from binding to histamine receptors, particularly H1 and H2 receptors. Intestinal leak – An intestinal leak allows large undigested food particles to enter the bloodstream – alerting the immune system to release histamine in response to the threat. Before moving on to a list of foods low in histamine, remember that it is not about following a correct or incorrect diet. The goal of functional medicine is to address the underlying cause: the cause of histamine intolerance. It is difficult to quantify the exact amount of histamine in foods, so you will find contradictory information and several different food lists on the Internet. Candida overgrowth – Fungal infections and histamine intolerance are highly correlated. Headaches, brain fog, chronic nasal congestion, flatulence, restless legs – yes, these are all signs of histamine intolerance. D-Hist – This product combines 5 strong nutrients to relieve symptoms and naturally break down histamines. DAO Enzymes – DAO supplements are most useful for those who have trouble breaking down histamine rather than producing it. However, antihistamines do not remove histamines from the body, that is, they can freely bind to other receptors. There is no single diagnostic tool to confirm a diagnosis, but an elimination regimen is the easiest and most convenient way to find out if you are histamine intolerant.