Histamine is an organic nitrogenous compound involved in local immune responses, as well as regulating physiological function in the gut and acting as a neurotransmitter for the brain, spinal cord, and uterus.

What does histamine do to the body?

Once released from its granules, histamine produces many varied effects within the body, including the contraction of smooth muscle tissues of the lungs, uterus, and stomach; the dilation of blood vessels, which increases permeability and lowers blood pressure; the stimulation of gastric acid secretion in the stomach; ...

Is histamine good or bad?

When you read the word histamine, you probably immediately associate it with antihistamine, which are drugs for allergy sufferers. However, histamine is not inherently bad. In fact, it's your body's way of letting you know you're allergic to something in your environment or something you consumed.