Quercetin with Bromelain - 120 Count 1,200mg Servings Immune Health Capsules - Supports Healthy Immune Functions in Men and Women Vegan Safe, Third Party Tested, Gluten Free by Double Wood

This Quercetin + Bromelain supplement is made in the United States and the manufacturer, Double Wood Supplements, confirms that it is third-party tested. The measurement of enzymatic activity of bromelain can vary and is complex. The manufacturer states that each serving of the supplement contains 1000mg Quercetin and 200mg Bromelain. The purity of the quercetin is confirmed at 80%. Reviews of the product are largely positive, with customers experiencing a better quality of life in terms of sinus health and allergies. Some customers noted an improvement in energy levels after taking the supplement. Some reviewers questioned whether the supplement works. One reviewer reported that they saw whitish/yellowish capsule content in their stool while taking it.