Quercetin & Zinc Immune Complex
Quercetin as a zinc ionophore — helps zinc cross cell membranes for immune defence. With 500mg vitamin C for synergistic support.
Auto-delivered. No minimum term. Cancel any time.
- Free UK delivery over £30
- 14-day hassle-free returns
- Secure checkout, audit-logged
- Manually compliance-reviewed
Order dispatched, tracking info sent. Most customers take their first dose the day it arrives.
Research shows it takes ~14 days to anchor a new habit. By now, most customers have found their ideal time of day.
At 8 weeks, customers report the strongest improvements. Consistency is everything with nutritional supplements.
Over 90% of Medibro subscribers are still on the same product at 3 months — the clearest signal a supplement is working.
Quercetin is a plant flavonoid that acts as a zinc ionophore — it facilitates the transport of zinc ions into cells. Intracellular zinc can inhibit viral RNA polymerase activity. Each capsule provides therapeutic doses of quercetin, zinc bisglycinate, and vitamin C.
Benefits
- ✓Immune defence
- ✓Antioxidant
- ✓Anti-inflammatory
- ✓Seasonal health
Complete your stack
✨What customers say
From 20 reviews★ 4.7Customers appreciate the significant reduction in colds and respiratory infections, often reporting impressive results after just a few months of use, thanks to the well-researched combination of quercetin, zinc, and vitamin C.
Some users noted minor complaints regarding the taste or ease of swallowing the tablets, and a few mentioned that results may vary, with not everyone experiencing the same level of immune support.
This product is ideal for individuals seeking to boost their immune health, particularly those exposed to frequent illnesses, such as teachers, healthcare workers, or anyone looking for preventive support during high-risk periods.
Customer reviews
- ★★★★★Doris W.23/05/20265 months with no illness
My wife convinced me to try this. Five months later I have had zero colds or respiratory infections, compared to my usual 3–4 per year. Genuinely impressive results.
- ★★★★★Ann P.03/05/2026Strong evidence base for this formula
The combination of quercetin (zinc ionophore), zinc and vitamin C has solid research behind it. My experience confirms the theory — significantly fewer infections this year.
- ★★★★★Helen M.02/05/2026Haven't had a cold since starting
I usually get 3–4 colds a year. It's been 5 months on this and not one illness. The combination of quercetin, zinc and vitamin C is clearly working for my immune system.
- ★★★★★Mabel S.29/04/2026Strongly recommend for immune health
Started this after recurring colds were affecting my work. Three months on, the frequency of illness has dropped dramatically. The quercetin and zinc combination is working well.
- ★★★★☆Carol T.29/04/2026Good immune support formula
The quercetin and zinc combination is well-researched. I've been taking it for 4 months and have only had one very mild cold in that time. Solid immune support product.
- ★★★★☆Edna F.16/04/2026Good daily immune support
I take this year-round as part of my wellness routine. My general health has improved and I've been much less susceptible to the bugs going around. Very satisfied.
- ★★★★★Janet C.25/03/2026Reduced frequency of illness
I work as a teacher and am exposed to every virus going. This supplement has noticeably reduced how often I get ill and how severe illness is when I do catch something.
- ★★★★★Susan B.23/03/2026Impressive immune support
I started this at the beginning of autumn when everyone at work was getting colds. I sailed through the whole winter without a single illness. The quercetin component seems to be key.
- ★★★★☆Betty W.22/03/2026Good combination for immune health
Simple but well-chosen ingredients at sensible doses. I take it daily through the autumn and winter months. I feel it supports my immune resilience well.
- ★★★★★Margaret L.21/03/2026Excellent immune boosting formula
I've shared this with my family and everyone reports fewer colds since starting. The quercetin seems to be the ingredient that makes this more effective than basic vitamin C alone.
- ★★★★★Pauline N.20/03/2026Effective and easy to take
I've been taking this through winter alongside a healthy diet and it's made a clear difference. Far fewer respiratory infections this year compared to previous winters.
- ★★★★★Ruth A.15/03/2026Significantly fewer colds
I've been tracking my health for 3 years. The winter I started this supplement was the first where I didn't get a single proper cold. Remarkable compared to previous winters.
- ★★★★★Dorothy K.09/03/2026Best immune supplement available
I've tried many immune supplements. The quercetin-zinc-C combination in this product is superior to basic vitamin C or zinc alone. The synergy between these ingredients is well-documented.
- ★★★★★Vera D.09/03/2026Exceptional protection this winter
Working in healthcare, I'm exposed to illness constantly. This is the first winter I haven't had a major respiratory infection in years. Very impressed with the protection this formula provides.
- ★★★★☆Nora B.07/03/2026Solid immune protection
I believe in the science behind quercetin as a zinc ionophore and this product delivers it at a meaningful dose. Combined with the zinc and vitamin C, it's a well-designed immune formula.
- ★★★★★Peter S.03/02/2026Anti-inflammatory benefits too
Quercetin is also a potent anti-inflammatory and antioxidant. Taking for immune support but also noticed reduced joint inflammation. The histamine-stabilising effect has helped my seasonal allergies too.
- ★★★★☆Diane W.18/12/2025Good preventive supplement
Taking during high-risk periods (winter, crowded events). Clear mechanism of action, quality ingredients, proper doses. The zinc bisglycinate form is the most bioavailable. Comprehensive immune support.
- ★★★★★William F.Verified buyer01/12/2025Post-COVID immune support
Long COVID affecting immune function. Functional medicine doctor recommended this specific combination. Quercetin + zinc has measurably improved my resilience. Fewer secondary infections since starting.
- ★★★★☆Maria K.Verified buyer26/11/2025Excellent immune stack
Both quercetin and zinc are independently researched for immune function. The synergy is the clever part. First winter on this without a significant illness. Coincidence? Taking it again next winter to test.
- ★★★★★Angela T.Verified buyer24/10/2025Zinc ionophore effect — clever formula
Quercetin acts as a zinc ionophore — it helps zinc enter cells where it can inhibit viral replication. Taking them together is significantly more effective than either alone. The science behind this combination is solid and well-established now.
Questions & answers
Loading…
Have you tried this product?
Log in to write a review