Brand: Researched NutritionalsFeatures: Multi-Faceted Mast Cell & Histamine Response Support - A comprehensive approach to support healthy mast cell function, immune health and histamine response systemically.* This holistic approach combines two proprietary complexes for dual mechanisms of action.* Mast Cell Secure Complex - Mast Cell Secure Complex promotes healthy amount of histamine release by supporting healthy mast cell function and balanced immune support.* HistaCheck Histamine Absorption Complex - Supports healthy level of histamine absorption by supporting a histamine block of receptors (via competitive inhibition).* Six Clinically Researched Flavonoids & Herbs - Includes Quecefit quercetin phytosome, nettle leaf, perilla seed, black cumin, luteolin, and fisetin supplements. Quercetin Supplement with 20x Increased Absorption - The form of quercetin in this product demonstrates 20 times increased absorption compared to standard Quercetin in published research.* Vegetarian & GMO-free formula. Part Number: RN167Details: HistaQuel immune supplement is a comprehensive formula providing a multi-faceted, systemic approach to supporting healthy mast cell function and histamine response.* HistaCheck as a DAO alternative: Many supportive allergy supplements, such as DAO, focus on reducing histamine within the gut by utilizing enzymes to degrade the histamine. Unfortunately, this means they are limited in their function and only effective for reducing food-derived ingested histamine in the GI tract. However, mast cells release histamine systemically. Therefore, when mast cells are activated