The Highly Purified Form of Quercetin – Toniiq Quercetin Capsules contain 1000mg of the highest quality quercetin powder in each serving– ethically sourced, grown and cultivated using an extraction process to ensure 95% standardized purity (other quercetin 500mg and quercetin 1000mg extracts contain 70% or less). A Key Active Ingredient – Quercetin has amazing health benefits, but purity has always been a major challenge for this flavonoid; something most other quercetin supplements don’t provide as it requires an extra step (and expense) in the manufacturing process. At 95% purity levels, Toniiq Quercetin provides one of the purest and most potent quercetin extracts available. Setting a New Standard for Purity – To ensure that you are getting the highest-quality product, each batch is tested for quality and purity both during and after manufacturing. Quality, First, and Foremost – Toniiq products are produced in a GMP-certified and NSF-approved state-of-the-art manufacturing facility right here in the USA.