Reviewed by Sarah Law, Dip CNM, Naturopathic Nutritionist
Quercetin and Bromelain: A Guide to the Popular Plant-Based Pairing
- Quercetin is a flavonoid found naturally in onions, apples, berries and many other plants.
- Bromelain is an enzyme group extracted from the stem and core of pineapples.
- The two are traditionally combined in a single supplement, a pairing many people prefer for convenience.
- Quercetin is a source of plant antioxidants (polyphenols) as part of a varied diet.
- Choose a supplement with a clear dose, a named quercetin source, bromelain measured in GDU, no bulkers, and UK GMP manufacturing.
Plant-based supplements continue to grow in popularity, and quercetin paired with bromelain is one of the combinations people ask about most. This guide explains what each one is, where it comes from, why the two are so often sold together, and what to look for if you decide to add a quercetin and bromelain supplement to your routine. We will keep it factual and practical, and point you to our own Quercetin & Bromelain where relevant.
A Note from Ben, Founder of Love Life Supplements
Quercetin and bromelain is one of those combinations people discover and then stick with. I am not going to make grand promises about it here, partly because the rules around plant supplements rightly do not allow that, and partly because I would rather just be straight with you about what it is.
What I can tell you is what we put in the bottle: a generous, clearly stated dose, a named quercetin source, bromelain measured by its actual enzyme activity, and no cheap bulking agents. It is made in the UK to GMP standards. That transparency is the part I am happy to stand behind.
Straight talking,
Ben Law
Founder, Love Life Supplements
What is quercetin?
Quercetin is a flavonoid found in many fruits, vegetables and grains, including onions, apples, capers and berries. Flavonoids are a large family of plant compounds known as polyphenols, and quercetin is one of the most widely studied. As a dietary component, it contributes to the antioxidant compounds you get from a colourful, plant-rich diet. It is this dietary antioxidant content, rather than any medicinal effect, that draws people to it.
What is bromelain?
Bromelain is an enzyme complex extracted from pineapples, particularly the stem and core. Enzymes like bromelain are proteases, meaning they act on proteins, which is why bromelain has a long history of culinary use as a meat tenderiser. In supplements, bromelain activity is measured in GDU (Gelatin Digesting Units), a way of expressing how active the enzyme is rather than simply its weight.
Why are quercetin and bromelain paired together?
The two are traditionally combined in a single product, and that pairing is now so common that many people look for them together rather than separately. Researchers have explored whether bromelain influences how quercetin is absorbed, and the combination remains a popular choice in the supplement world. For most people, the appeal is simple: two plant-derived ingredients they already wanted, in one convenient capsule.
Featured product
Quercetin & Bromelain, UK-made
Quercetin & Bromelain
1000mg quercetin (Sophora japonica) + 500 GDU bromelain per serving · 60 capsules · no bulking agents · UK GMP
✓ Named quercetin source✓ Bromelain by GDU activity✓ No bulking agents✓ UK GMP made
Where quercetin and bromelain come from in the diet
You do not only get these compounds from supplements. Quercetin is naturally present in a wide range of everyday foods, so a varied, plant-rich diet already supplies it. Bromelain comes from pineapple, concentrated in the parts we usually discard. A supplement is simply a convenient, standardised way to take a consistent daily amount, which is harder to achieve from food alone given how variable natural content can be.
Quercetin in food
- Onions (especially red onions) and shallots
- Apples, particularly the skin
- Berries such as blueberries, cranberries and blackberries
- Capers, which are among the richest dietary sources
- Leafy greens, broccoli and many herbs
"People often come to quercetin and bromelain expecting it to be some exotic compound, but quercetin is just a flavonoid you are already eating in onions and apples, and bromelain comes from pineapple. A supplement is really about getting a consistent, standardised daily amount, which is genuinely hard to do from food because natural levels vary so much. I always tell clients to treat it as a complement to a plant-rich diet, not a substitute for one."
— Sarah Law, Naturopathic Nutritionist & Functional Practitioner | Optimised Female
How to take quercetin and bromelain
If you choose a supplement, follow the label. For our product the guidance is straightforward:
- Dosage: two capsules per day. Do not exceed the recommended intake; taking more does not improve the result.
- With meals: take with food, ideally a main meal, for comfort and to build a consistent daily habit.
- Storage: keep in a cool, dry place out of direct sunlight, and out of reach of children.
- Age: intended for adults over 18.
- Check first: if you have a medical condition or take medication, speak with your GP or pharmacist before starting.
- Lifestyle: supplements work best alongside a balanced diet, not as a replacement for one.
- Special cases: if you are pregnant, breastfeeding, or taking mood-modifying medication, this supplement may not be suitable for you.
How to choose a quality supplement
Quercetin and bromelain products vary widely. These are the practical markers of a well-made one:
- Stated dose: our serving provides 1000mg of quercetin sourced from Sophora japonica, a plant known for its high flavonoid content, plus 500 GDU of bromelain from pineapple.
- GDU, not just milligrams: bromelain expressed in GDU tells you about enzyme activity, which milligrams alone do not.
- Clean formula: we formulate without unnecessary bulking agents, so you get the active ingredients and little else.
- UK GMP: produced in the UK under Good Manufacturing Practice licences for consistent quality control.
How our supplement compares
| Feature | Love Life Supplements Quercetin & Bromelain | Many generic options |
|---|---|---|
| Dose | 1000mg quercetin, 500 GDU bromelain per serving | Often lower or undisclosed dosages |
| Manufacturing | Made in the UK under GMP licences | Standards vary, not always transparent |
| Purity | No bulking agents, clean formula | May include fillers or additives |
| Ingredient quality | Quercetin from Sophora japonica, bromelain by GDU activity | Source often unspecified |
FAQs
What are quercetin and bromelain?
Quercetin is a plant flavonoid found in foods such as onions, apples and berries. Bromelain is an enzyme group extracted from the stem and core of pineapples. They are often combined in a single supplement.
Why are they taken together?
They are popularly paired, and many people prefer the convenience of a single combined capsule rather than buying each separately.
How do I take them?
Our supplement is taken as two capsules per day, ideally with a meal. Do not exceed the recommended intake. It is intended for adults over 18.
Is it suitable for everyone?
It is intended for healthy adults over 18. If you are pregnant, breastfeeding, taking medication or have a medical condition, speak with your GP or pharmacist before use.
What makes a good quality supplement?
A clear stated dose, a named quercetin source such as Sophora japonica, bromelain measured in GDU activity, no unnecessary bulking agents, and UK GMP manufacturing.
A simple, transparent choice
Quercetin and bromelain is a popular, plant-derived pairing, and the most useful thing we can do is be transparent about what is in the bottle and how to take it. If that approach suits you, our Quercetin & Bromelain gives you a clearly dosed, UK-made option with no unnecessary extras.
For more guides like this one, explore our blog, or use our supplement quiz to find products suited to your routine.
References
- Foods high in quercetin. WebMD. Source
- What to know about bromelain. Medical News Today. Source
- Quercetin: overview. National Library of Medicine. Source
Last reviewed June 2026.
About the Reviewer — Sarah Law, Dip CNM
Sarah Law is a Certified Naturopathic Nutritionist and Functional Practitioner specialising in hormonal health, gut health, and evidence-based nutrition. She holds a Diploma in Naturopathic Nutrition from the College of Naturopathic Medicine (CNM, London) and is a Certified Functional Health Coach. Sarah combines naturopathic principles with modern functional nutrition science to help her clients make informed health decisions.
About the Author — Ben Law
Ben Law is the founder of Love Life Supplements and host of the Optimised Health Show. A qualified Advanced Dietary Supplement Advisor and Primal Blueprint Certified Expert, he champions science-led, transparent formulations and UK manufacturing standards. Over the last decade he has helped thousands of UK customers choose supplements with confidence.