Pure Defense with NAC by Pure Encapsulations features a synergistic blend of quercetin, vitamin C, vitamin D, zinc, elderberry and NAC. Quercetin, found naturally in apples, onions, and many autumn foods, lowers inflammation, stabilizes mast cells, and helps control allergy and histamine responses that can spike as seasons change. Elderberry is also a powerful flavonoid that supports the immune and respiratory systems. The immune benefits are amplified when paired with vitamin C and zinc, both included in Pure Defense with NAC for additional antiviral and antioxidant action. NAC, another key ingredient, boosts glutathione—your body’s master antioxidant—and supports healthy respiratory function, while vitamin D and zinc further fortify immune reserves for seasonal resilience. This thoughtful combination provides robust, broad-spectrum support to help your body weather fall’s viral and inflammatory challenges with confidence.