Quercetin with Bromelain, 120 Vegetarian Capsules, NOW FoodsNOW Quercetin Plus Bromelain Capsules Supports Immune Function. Supports Healthy Histamine Levels. Helps Manage Seasonal Discomfort. Vegetarian Vegan Product. 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 therefore