





Immunity+ Advanced
Highly absorbable quercetin with vitamins C & D for everyday immune support
Helps Support
Immune
Wellbeing
- 250mg Quercefit®, a highly bioavailable form of quercetin
- With vitamins D and C for additional immune support
- Up to 20x higher bioavailability than standard quercetin (Riva A. et al., Eur J Drug Metab Pharmacokinet, 2019)
- Backed by more than 10 human studies
- Each capsule equivalent to 5,000mg of standard quercetin powder
Quercetin is a natural flavonoid found in many fruits and vegetables; however, it's not easily absorbed by the body. Each capsule of our Quercetin Phospholipid Complex delivers the equivalent to 5,000mg of standard quercetin and is up to twenty times more absorbable than standard quercetin tablets.
V Ve
| Ingredient | Per capsule | %NRV* |
|---|---|---|
| QuerceFit® Quercetin Phospholipid Complex of which Quercetin |
250mg 85mg |
N/A |
| Vitamin C | 80mg | 100% |
| Vitamin D3 | 5µg | 100% |
* Nutrient Reference Value


What is quercetin?
Quercetin is a natural plant compound – a flavonoid – found in many everyday fruits and vegetables, including onions, apples, berries and leafy greens. Quercetin is highly valued for its antioxidant, anti-inflammatory and immune-supporting properties.
But standard quercetin isn’t easy for the body to absorb. Taking even a large amount of ordinary quercetin powder may deliver relatively little support where it’s needed. That’s the problem Immunity+ Advanced is designed to solve.

Quercefit® – up to 20x more bioavailable
Immunity+ Advanced uses Quercefit®, a quercetin phospholipid complex that combines quercetin (from the flowers of the Japanese Pagoda tree) with sunflower lecithin. In a human clinical study, Quercefit® was shown to make quercetin up to 20 times more absorbable than standard quercetin (Riva, A. et al., Eur J Drug Metab Pharmacokinet, 2019).
Each single capsule delivers the equivalent of 5,000mg of standard quercetin powder, to give an effective, well-absorbed dose without having to take a large amount.

Why vitamins C and D?
Immunity+ Advanced pairs highly bioavailable quercetin with two vitamins important for your immune health:
Vitamin C (80mg, 100% NRV) – contributes to the normal function of the immune system and helps to protect cells from oxidative stress.
Vitamin D (5µg, 100% NRV) – contributes to the normal function of the immune system and helps to maintain healthy bones and muscles. Sourced from lichen, it’s suitable for vegans.

Is Immunity+ Advanced right for you?
Immunity+ Advanced is for anyone looking for highly absorbable quercetin with immune-supporting vitamins, particularly if:
- You want to support your immune system, especially through the seasons when it’s under more pressure
- You’re looking for a form of quercetin with 20x higher bioavailability than standard quercetin, proven by a human clinical study (Riva A. et al., Eur J Drug Metab Pharmacokinet, 2019)
- You want quercetin paired with vitamins C and D in one daily capsule
- You want a quercetin supplement suitable for a vegan or vegetarian diet
Please note: Immunity+ Advanced supports immune health as part of a balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking any medication or under medical supervision, consult a doctor or pharmacist before use.
“With quercetin, absorption really matters. That’s why we use Quercefit®, with clinically proven high bioavailability, combined with vitamins C and D to provide a well-rounded formula for everyday immune support.”

Ingredient highlights

Quercetin is a natural flavonoid antioxidant found in fruits and vegetables such as onions, apples and berries – but it’s poorly absorbed in its standard form.
Immunity+ Advanced uses Quercefit®, a quercetin phospholipid complex, which combines quercetin from the Japanese Pagoda tree (Sophora japonica) with sunflower lecithin. This makes it easier for the quercetin to pass through the gut and into your bloodstream.
In a human clinical study, Quercefit® was shown to make quercetin up to 20 times more absorbable than standard quercetin (Riva, A. et al., Eur J Drug Metab Pharmacokinet, 2019).
Each capsule provides 250mg of the Quercefit® complex (of which 85mg is quercetin, equivalent to 5,000mg of standard quercetin powder, in a single, well-absorbed daily capsule.

Immunity+ Advanced pairs quercetin with two vitamins central to immune health. Vitamin C (80mg, 100% NRV) contributes to the normal function of the immune system and to the protection of cells from oxidative stress.
Vitamin D (5µg, 100% NRV) contributes to the normal function of the immune system and to the maintenance of normal bones and muscle function. The vitamin D comes from lichen, making it suitable for vegans.
Quercetin is a natural flavonoid antioxidant found in fruits and vegetables such as onions, apples and berries – but it’s poorly absorbed in its standard form.
Immunity+ Advanced uses Quercefit®, a quercetin phospholipid complex, which combines quercetin from the Japanese Pagoda tree (Sophora japonica) with sunflower lecithin. This makes it easier for the quercetin to pass through the gut and into your bloodstream.
In a human clinical study, Quercefit® was shown to make quercetin up to 20 times more absorbable than standard quercetin (Riva, A. et al., Eur J Drug Metab Pharmacokinet, 2019).
Each capsule provides 250mg of the Quercefit® complex (of which 85mg is quercetin, equivalent to 5,000mg of standard quercetin powder, in a single, well-absorbed daily capsule.
Immunity+ Advanced pairs quercetin with two vitamins central to immune health. Vitamin C (80mg, 100% NRV) contributes to the normal function of the immune system and to the protection of cells from oxidative stress.
Vitamin D (5µg, 100% NRV) contributes to the normal function of the immune system and to the maintenance of normal bones and muscle function. The vitamin D comes from lichen, making it suitable for vegans.


Trusted by thousands
Ray M.
I maintain good energy levels
This is my go to product as I find that I maintain good energy levels through its daily use,
Elaine M
I've found it gives me extra energy
My husband and I take it I've found it gives me extra energy and my husband takes it as he is on Stations which are known to deplete Q10 in the body
Mr Hardwick.
They have helped to keep my blood pressure down.
Been on these tablets for a few years now and they have helped to keep my blood pressure down.
Robert N.
Do seem to have more energy
Bought this for my wife in hope that it would help her memory but decided not to give it as not sure about her other tablets so taking myself not sure if it is having any effect but do seem to have more energy so will keep taking for a while.
FAQs
What is quercetin, and what is it good for?
Quercetin is a natural flavonoid – a plant compound – found in many everyday fruits and vegetables, including onions, apples, berries and leafy greens. It’s one of the most abundant antioxidants in our diets and has become popular as a supplement among people looking to support their immune health and general wellbeing. In Immunity+ Advanced, the quercetin is provided in a highly absorbable form (Quercefit®) and paired with vitamins C and D, which contribute to the normal function of the immune system.
Why is Immunity+ Advanced 20x more absorbable than standard quercetin?
Quercetin is notoriously difficult for the body to absorb in its standard form. Immunity+ Advanced uses Quercefit®, a quercetin phospholipid complex which combines quercetin (from the Japanese Pagoda tree) with sunflower lecithin so the body can absorb it far more readily. In a human clinical study, Quercefit® was shown to make quercetin up to 20 times more absorbable than standard quercetin (Riva A. et al., Eur J Drug Metab Pharmacokinet, 2019). In practice, each capsule delivers the equivalent of 5,000mg of standard quercetin powder, so you get a well-absorbed dose without needing to take large amounts of poorly-absorbed powder.
What is the difference between quercetin and vitamin C – do I need both?
They are different things that work well together. Vitamin C is an essential vitamin that contributes to the normal function of the immune system and the protection of cells from oxidative stress. Quercetin is a plant flavonoid and dietary antioxidant. Many people specifically look for quercetin alongside vitamin C, which is exactly what Immunity+ Advanced provides – highly absorbable Quercefit® quercetin with vitamin C (and vitamin D) in a single daily capsule, rather than needing to take them separately.
Is Immunity+ Advanced the same as Quercetin+?
Yes. Immunity+ Advanced is the product formerly known as Quercetin+ – it has been repositioned with a name that better reflects its immune-support focus, and it combines the same highly absorbable Quercefit® quercetin with vitamins C and D. If you previously bought Quercetin+, Immunity+ Advanced is the product you are looking for.
How and when should I take Immunity+ Advanced, and is it suitable for vegans?
Take one or two capsules per day, morning or evening, with or without food. It is designed for consistent daily use, and is particularly popular for seasonal immune support. Immunity+ Advanced is suitable for vegans and vegetarians: the quercetin comes from the Japanese Pagoda tree, the vitamin D is from a lichen source (rather than the usual animal-derived D3), and the capsule is plant-based.
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Trusted by experts
Dr Max Gowland
Chief Scientific Officer
Max's passion is to help the over 50s stay healthy and stay active. He holds a PhD in Amino Acid Chemistry from Nottingham University and has held numerous senior directorships with global companies.
Dr Miriam Ferrer
Head of Product Development
Miriam did a PhD in cancer biology at Free University Amsterdam before spending three years on post-doctoral research at the Medical Research Council Laboratory of Molecular Biology in Cambridge.
Dr Aidan Goggins
Nutritionist and author
Aidan is a pioneer of the 'modern day medicine' movement. Based on the idea that to treat the underlying causes of disease, you should first seek out and treat nutritional deficiencies in the body.
Mr Peter Kirkpatrick
Medical advisor
Peter is a leading expert on strokes and arterial and vascular disease affecting the brain, and has published more than 200 studies. He is also president of the Cambridgeshire branch of Headway.
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