Pure Encapsulations Quercetin – 500 mg – Immune Support, Cellular Health & Heart Health* – Antioxidant Supplement – Gluten Free & Non-GMO – 120 Capsules

Customers find the supplement effective for histamine intolerance and immune system support, with one mentioning it helps control hives and angioedema. Moreover, the product receives positive feedback for its quality, clean ingredients, and ease of use. However, customers disagree on the side effects, with some experiencing stomach pain. Additionally, opinions on value for money are mixed, with some finding it a good value while others consider it too expensive.