Tyramine is a naturally occurring compound found in various foods, particularly those that are aged or fermented. It is formed from the amino acid tyrosine and can influence blood pressure by causing the release of norepinephrine, a neurotransmitter. Foods high in tyramine include aged cheeses, cured meats, and certain fermented products. For most people, tyramine is harmless, but it can pose risks for individuals taking certain medications, especially monoamine oxidase inhibitors (MAOIs). These medications can interact with tyramine, leading to dangerously high blood pressure. Therefore, people on MAOIs are often advised to avoid tyramine-rich foods.