Quercetin has significant levels of antioxidants that are beneficial for seasonal changes and provide assistance in the whole year. Zinc, another component of vitamin C, supports the immune system and metabolism. The health of bones and teeth is enhanced by vitamin D. We are glad to say that our supplements are manufactured and quality-tested in the USA. NON-GMO, free of stearate, fillers, dangerous pesticides, preservatives, and added sugar. only consists of healthy natural components! SUPPORTS IMMUNE DEFENSE - Quercetin with Bromelain Capsules are made from plant flavonoids that are found in a variety of fruits and vegetables.* Quercetin may help boost your immune system's ability to fight off free radicals as well as improving natural cell responses and metabolism.* ANTIOXIDANT PROPERTIES SUPPORT - Quercetin may help with antioxidant action protecting against LDL (good) cholesterol oxidation and promotes arterial health.* It may help to naturally promotes balanced arterial pressure and lipid behavior.* Bromelain - is a proteolytic enzyme (protease) that is found in pineapple juice and in the pineapple stem. Bromelain is a part of the group of protein digesting enzymes that is favored because it can be absorbed through the gastrointestinal (GI) tract without much degradation. Bromelain can also help other compounds be absorbed within the body.* Zinc - is a vital mineral that is essential for immune system support and messaging within cells. Zinc can help stop the reproduction of intruders inside cells. However, it does require assistance to enter the cells and this is why our blend also contains a 500mg of Organic Quercetin to support this important process.* Vitamin D3 - (as cholecalciferol) is a fat-soluble vitamin that is naturally found in some foods. Vit D plays a vital role in the body and supports calcium absorption in the gut and bone health and strength. In addition, Vitamin D helps control cell growth and immune function.*