MCAS and Histamine Intolerance, From Symptoms to Support

October 19, 2026

Could unexplained itching, headaches, digestive issues, or reactions to certain foods be related to histamine? Registered dietitians Melanie Beasley and Britni Vincent explain the differences between histamine intolerance and mast cell activation syndrome (MCAS), including common symptoms, potential triggers, and the role of nutrition. Learn which foods may be high in histamine, why freshness and food preparation matter, and how an individualized low-histamine diet can help identify triggers without unnecessarily restricting your food choices.