ANTIOXIDANT SUPPORT - Quercetin has been called "king of the flavonoids" because of its powerful antioxidant properties and its ability to support a healthy inflammatory response in the body. It is found in many foods that are recognized for their health benefits, such as red onions, apples, olive oil, dark berries and grapes, capers, salad greens and culinary herbs such as dill, cilantro, watercress, and radicchio. * FOR SEASONAL ALLERGIES - HistaEze is a blend of nutrients and botanical extracts designed to support a healthy immune response during times of seasonal upper respiratory challenges. The product contains Tinofend, Vitamin C, quercetin, and nettles. * CLINICALLY RESEARCHED EXTRACT - HistaEze features Tinofend, a patented and clinically researched extract derived from the plant Tinospora cordifolia, which has been shown to regulate key immune mediators and support the activity of macrophages. * HIGHER STANDARDS. BETTER RESULTS - Designs for Health maintains a strict, no-compromises approach to quality raw material selection. We never cut corners with substandard ingredients. This product is Non-GMO, Gluten-Free, and Vegetarian-friendly. OVER 50,000 DOCTORS AGREE - Designs for Health is the physician's choice for top quality professional strength supplements since 1989. Our "Science First" philosophy ensures our products are based on the most recent research and use the highest quality raw ingredients. #1 IN CONSUMER SATISFACTION - Designs for Health was voted #1 in Consumer Satisfaction in 2016 and 2017 in a Consumer Labs survey of Healthcare Practitioner Brands.