Quercenase is a dietary supplement manufactured by Thorne, a globally recognized brand in the production of health supplements. It is packaged in a bottle containing 60 vegetarian capsules designed for oral consumption. Quercenase contains two active ingredients: quercetin and bromelain. Quercetin is a type of plant-based chemical, or phytochemical, recognized for its antioxidant properties. It is found in many fruits and vegetables, such as red wine, onions, green tea, apples, and berries. Bromelain, on the other hand, is an enzyme found in pineapples known for its anti-inflammatory properties.

Thorne’s Quercenase is formulated to combine the antioxidant effect of quercetin and the proteolytic enzyme activity of bromelain. This is expected to support the body's normal inflammatory response and enhance the health of the respiratory tract. Quercenase also supports cardiovascular health and is reported to have anti-cancer characteristics.

It is recommended that one capsule be taken twice a day, although the dose may be adjusted according to the advice of a healthcare practitioner. The product is free from gluten and is GMO-free. It does not contain any of the common allergens like egg, shellfish, tree nuts and peanuts. It is not suitable for pregnant or nursing women without medical consultation. Side effects are rare but can include gastrointestinal discomfort.