More Powerful Immune Support: Our complex includes 500mg quercetin, so it’s twice as potent than weaker <250mg supplements. We offer broad-ranging support with 5 added nutrients, synergized for optimum efficacy, to fortify quercetin’s antio-oxidant, free radical fighting properties. Significantly More Absorption: Quercetin alone isn’t highly absorbable. We combine quercetin with bromelain and 500mg vitamin C, absorption-boosting ingredients. We’ve also added zinc citrate (with more bioavailability than weaker sulfate forms), and vitamin D3 that’s 3X more potent than vitamin D2. Natural Ingredients: Our supplement features 150mg stinging nettle root. It’s packed with all 9 essential amino acids, plus antioxidant polyphenols. Unlike the leaves that are often used in other supplements, the root contains no vitamin K, known to cause bad reactions for people on blood thinners. Max Nutrient Formula: Don’t be fooled by fewer capsules. We use 4 capsules per dosage. This gives you the optimized quantity of 500mg each of potent quercetin and vitamin C, while minimizing side-effects that can often be seen in other supplements with higher doses of 1000mg. No nasty additives: Our vegetarian bromelain-quercetin supplement has no gluten, sugar, wheat, gelatin, artificial colors, or silicon dioxide. Our manufacturing facility is recognized by GMP standards, and is made in the USA with natural ingredients.