Quercetin with Bromelain, Value Size, 240 Veg Capsules, NOW FoodsNOW Foods Quercetin with Bromelain Dietary Supplement. Supports Immune Function. Supports Healthy Histamine Levels. Helps Manage Seasonal Discomfort. Vegetarian Formula. Quercetin is a naturally occurring bioflavonoid that supports healthy histamine levels, thereby helping to sustain a balanced immune response. Bromelain, an enzyme derived from pineapple stems, also supports healthy immune system function. The combination of Quercetin and Bromelain