Quercenase (Quercetin / Bromelain) acts as a dietary supplement that brings together quercetin and bromelain to support respiratory comfort and immune balance. The key ingredient, quercetin phytosome, helps stabilise mast cells and modulate immune responses, which can ease seasonal irritation and support a smoother breathing experience daily. Thorne is a trusted name in pharmaceutical-grade supplements, with strict quality controls and external testing. Together, this blend is made for daily immune support.

Benefits & Features:

• Supports seasonal immune comfort.
• Quercetin phytosome acts as the key ingredient, helping stabilise mast cells and modulate immune responses to ease seasonal irritation and support a smoother breathing experience daily.
• Bromelain helps support healthy inflammatory processes in tissues and respiratory pathways.
• Thorne’s GMP certified facilities and external testing help ensure label accuracy and low contaminant levels, giving you confidence in what you take.
• Designed for daily use with a vegetarian capsule that pairs well with probiotics in a holistic routine.

Thorne has earned a reputation for pharmaceutical-grade manufacturing and transparent quality controls. Quercenase uses quercetin phytosome, a form believed to boost bioavailability, paired with bromelain from pineapple stems to support healthy inflammatory responses. The formula is produced in GMP-certified facilities and undergoes independent testing to verify label accuracy and purity. This blend reflects Thorne’s longstanding commitment to evidence-led, practitioner-trusted nutrition, a reason why many healthcare professionals recommend it. In our broader range, you’ll also find berberine, probiotics, and vitamin d supplement options to support overall wellbeing.

Bromelain, Quercetin Phytosome

• GTIN: 693749332022
• Manufacturer: Thorne
• Categories: BromelainGout SupplementsLung & Respiratory SupplementsNew ArrivalsPopular Supplement BrandsQuercetinThorne Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one capsule three times a day or as directed by your healthcare professional. Take four (4) softgels twice daily with meals\, or as recommended by a healthcare practitioner.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: Quercetin (Phytosome Form)

Quercetin is a natural plant flavonoid with potential benefits for immune and inflammatory responses. This formulation uses quercetin phytosome to help boost bioavailability and delivery.

In this product quercetin is paired with bromelain to support overall inflammatory response and immune balance, with quercetin providing the primary active action.

What Does Quercetin Do?

Quercetin helps stabilise mast cells and reduces the release of histamine and other inflammatory mediators while supporting immune balance.

Dr. Mlcek of a university has reported that quercetin can contribute to the regulation of inflammatory processes, aligning with EFSA-friendly concepts of normal immune function.

This formula also includes bromelain, which supports healthy inflammatory responses by helping break down protein complexes in tissues.

Compliance disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease.

Thorne is recognised for its steadfast commitment to quality, making Thorne the obvious pick for Welzo. The manufacturer’s track record of pharmaceutical‑grade standards, openness and ongoing investment in quality controls underscores why we team with them for Quercenase.

This brand blends rigorous product quality with solid testing practices, including third‑party verification to ensure label accuracy and safety. Thorne’s status as an FDA‑registered manufacturer and its GMP‑certified facilities reflect strict production discipline and a strong safety culture that aligns with Welzo’s expectations. For our team, this reliability translates into a product that is backed by a well‑established quality framework and ongoing quality assurances, which you can explore through our ingredient quality and purity standards and by checking our medical team.

We chose Thorne over other brands because of their heritage, professional endorsement and proven commitment to science‑led formulation. This makes Thorne especially suited for Quercenase, a formula designed to support immune modulation and respiratory comfort as described in the research into the product, while keeping UK regulatory alignment and local market know‑how.