Histamine Genetics ⬇️ While genes alone aren't the determining factor for histamine intolerance, these six genes can influence your susceptibility to developing histamine intolerance. Here's how! 🧬 DAO: People with DAO gene variations may experience headaches, migraines, digestive issues, skin problems, and allergic-like reactions after consuming foods high in histamine or histamine-releasing substances. 🧬 HNMT: People with HNMT gene variations may experience symptoms of histamine intolerance,