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Quercetin is a flavonoid found naturally in foods such as onions, apples, and capers.
£35
Quercetin is a flavonoid found naturally in foods such as onions, apples, and capers.
Quercetin is a flavonoid found naturally in foods such as onions, apples, and capers. It is studied for its antioxidant activity and its role in modulating inflammatory pathways, particularly in the context of immune function and seasonal respiratory health.
Follow the dosage on the packaging. Based on the product label, one capsule taken one to two times daily is the indicated dose. Quercetin may be taken with food to reduce any gastrointestinal discomfort.
Thorne Quercetin Phytosome is a quercetin supplement formulated to address one of the compound's most well-documented limitations: poor absorption. Quercetin is a flavonoid found naturally in foods such as onions, apples, and capers. It is studied for its antioxidant activity and its role in modulating inflammatory pathways, particularly in the context of immune function and seasonal respiratory health. The phytosome delivery system binds quercetin to phosphatidylcholine, a phospholipid, which significantly improves how much of the compound crosses the gut wall into circulation compared with standard quercetin extracts.
This makes it a considered choice for people who want the benefits associated with quercetin supplementation but have found standard forms underwhelming, or who simply want confidence that the dose they take is the dose that reaches the bloodstream. It may suit those managing seasonal allergies, supporting immune resilience during high-exposure periods such as winter months or heavy training blocks, or looking to complement an anti-inflammatory nutritional strategy.
Thorne is a brand with a long-standing reputation for formulation rigour and manufacturing quality. Their use of the phytosome technology here reflects a practical, evidence-informed approach: choosing a delivery form that the research supports rather than relying on a high headline dose to compensate for poor bioavailability.
Standard UK delivery included on every order, 1 to 3 working days after dispatch.
Next working day for £25 when you order by 12pm. Orders placed before 12pm on a working day leave the same day. Later orders leave the next working day.
You can return unopened and unused items within 30 days of delivery. This does not affect your statutory rights. Read the delivery and returns terms
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Sign inA phytosome binds an active compound — in this case quercetin — to phosphatidylcholine, a phospholipid the body recognises and absorbs readily. This significantly improves how much quercetin passes through the gut wall into circulation compared with unbound quercetin extracts, meaning more of the ingredient is available to act in the body.
It is worth considering if you experience seasonal allergies, want to support immune resilience during winter or periods of increased exposure, or are following a broader anti-inflammatory nutritional protocol. It may also suit those who have tried standard quercetin before and noticed little effect.
Quercetin can interact with certain medications, including some antibiotics and drugs metabolised by the cytochrome P450 enzyme system. If you are taking any prescription medication, check with your GP or pharmacist before adding this supplement.
For seasonal allergy support, some people notice a difference within a few weeks of consistent use, though this varies. For broader antioxidant and immune support, benefits tend to be cumulative and are better assessed over one to three months.
Taking quercetin with food is generally advisable to reduce the chance of mild gastrointestinal discomfort. The phospholipid component in the phytosome formulation also means it may be better tolerated with a small amount of dietary fat, which can further support absorption.
Overall
6 months ago
I'd tried two other quercetin supplements over the past year and noticed very little. Switched to this phytosome version about six weeks ago and the difference is real — hayfever symptoms noticeably calmer, and I've sailed through a cold my whole office caught. Takes a few weeks to kick in but once it does, you feel it.
6 months ago
Take this alongside vitamin D and zinc through winter. No dramatic claims but I've been consistently well since starting it, which for me is unusual. Capsules are easy to swallow and no weird aftertaste.
6 months ago
Does seem to do what it says — my seasonal allergies have been milder this spring. But at £34.49 for the bottle size, it's not cheap for a daily supplement. I'll keep buying it but it stings a bit. Quality feels right for the brand though.
6 months ago
Was sceptical about the absorption angle being marketing fluff but the results speak for themselves. Previous standard quercetin did nothing. This one, I genuinely feel a difference with my sinuses.
7 months ago
Bought this on a friend's recommendation after she used it through a rough winter. Happy with it — immunity has held up well and I like that there's actual science behind the delivery form rather than just a big dose number on the label.
7 months ago
Been using various supplements for years and Thorne's quality is consistently up there. This quercetin product fits right in. Takes it in the morning with food. No digestive complaints, which I have had with cheaper quercetin products.
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