Your Body Releases Histamine To Protect You. The Problem Is When It Won't Stop
Quercetin is one of the most studied plant compounds for histamine balance. Researchers keep coming back to it for one reason:
It works with the cells that release histamine — helping your body stay calm instead of firing up.
The problem is getting enough of it in.
Most quercetin passes right through you. (Standard capsules. Even liposomal and phytosome forms. Not enough quercetin makes it into your blood to matter.)
QuercElite fixes that. Mara Labs pairs quercetin with our Broccoli Seed Complex so your body actually takes in and uses more of it.
Not just a spring fix. Year-round support for a body that's ready to feel steady.
Regularly $49.99
The Broccoli Seed "V.I.P." Advantage
Think of your gut like a big gate with security guards.
When quercetin shows up on its own, the guards often say:
❌ “Sorry, you can’t come in.”
→ Since most quercetin is only 5% bioavailable, the majority of it just passes through unused.
But broccoli seeds bring backup.
Broccoli seeds naturally release sulforaphane — a plant compound that acts like a VIP badge.
Sulforaphane signals the guards to open the gate and let more nutrients into your body.
Along with sulforaphane, broccoli seeds provide other protective phytochemicals.
These provide an additional "V.I.P effect"...
Helping your body absorb more quercetin.
They:
✅ Help your body activate Phase II detox enzymes.
✅ Flip on a master switch for cellular protection, called Nrf2.
✅ Create a cleaner, friendlier environment so more quercetin can get in and stay active.
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Kate L., Verified Reviewer
QuercElite Versus Standard Quercetin Supplements
Why People Choose QuercElite
✔️ Crafted in Virginia — Not overseas mass production.
✔️ Proprietary Broccoli Seed Complex — Sulforaphane + cofactors. Only found in Mara Labs formulas.
✔️ 100-Day Guarantee — Try it, love it, or send it back.
✔️ Clean Formula — Vegan, non-GMO, gluten-free.
Want To Take QuercElite For A Test Drive?
Don’t Get Dazzled by Multipliers
“7× more absorbed!” … “20× stronger!”
It sounds impressive coming from other quercetin brands.
But most of those claims come from tiny studies. They also tend to measure quick blood spikes...
Not the steady, usable levels your body actually needs.
What's important in reality?
It’s not how much quercetin you swallow...
It’s how much your body can use.
Here's What Our Customers Are Saying...️
What makes Mara Labs different from other supplement companies?
Mara Labs is a small company based out of Charlottesville, VA. We create, produce, and ship all of our products under one roof, which is rare in the supplement world. We are committed to creating and delivering products backed by evidence-based research to you and your loved ones.
Is there a number I can call if I have other questions?
Sure! We'd be more than happy to get your questions answered.
Feel free to give our customer support team a call at: 1-810-SPROUTS (777-6887)
1. ClinicalTrials.gov. Safety and Effectiveness of Quercetin & Dasatinib on Epigenetic Aging. Identifier NCT04946383. Updated Aug 2021.
2. Aghababaei F, Hadidi M. Recent Advances in Potential Health Benefits of Quercetin. Pharmaceuticals. 2023;16(7):1020.
3. Sultana A et al. Role of Inflammation, Oxidative Stress, and Nutritional Supplements in Premenstrual Symptoms. Oxid Med Cell Longev. 2022;2022:3599246.
4. Bai Y et al. Quercetin Relieves Oxidative Damage and Inflammation in Vein Tissue. Evid Based Complement Alternat Med. 2021;2021:6251559.
5. Ghafouri-Fard S et al. Emerging Impact of Quercetin in Prostate Cancer. Biomed Pharmacother. 2021;138:111548.
6. Suzuki T, Hara H. Quercetin Enhances Intestinal Barrier Function. J Nutr. 2009;139(5):965-74.
7. Uyanga VA et al. Implications of Citrulline and Quercetin on Gut Function. Nutrients. 2021;13(11):3782.
8. Gao F et al. Quercetin Ameliorates Ulcerative Colitis and Repairs Intestinal Barrier. Front Pharmacol. 2024;15:1351538.
9. Feng J et al. Quercetin Alleviates Intestinal Inflammation via Gut Microbiota. Poult Sci. 2023;102(3):102433.
10. Weng Z et al. Quercetin More Effective Than Cromolyn in Blocking Mast Cell Release. PLoS One. 2012;7(3):e33805.
11. Li Y et al. Quercetin, Inflammation and Immunity. Nutrients. 2016;8(3):167.
12. Mlcek J et al. Quercetin and Its Anti-Allergic Immune Response. Molecules. 2016;21(5):623.
13. Redha AA, Torquati L, Bows JR, Gidley MJ, Cozzolino D. Microencapsulation of Broccoli Sulforaphane. Food Funct. 2024.
14. Fahey JW, Wade KL, Wehage SL, Holtzclaw WD, Liu H, Talalay P, Fuchs E, Stephenson KK. Stabilized Sulforaphane for Clinical Use. Mol Nutr Food Res. 2017;61(4).
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Delores L., Verified Buyer*
Frequently Asked Questions
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Great Product
5/5 stars
✓
Anne McCain Brown, Verified Buyer
THIS WORKS!!
5/5 stars
I rarely leave reviews. I experiment with a lot of natural products and usually don’t notice much. With this, I’ve felt more steady and comfortable day to day, so I now take it daily. I still keep an inhaler for rough air days in Los Angeles, but I reach for it far less often. Big win for me
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Jessica, Verified Reviewer
Better Absorbed & Includes Broccoli Seed Complex
4/5 stars
I take quercetin mainly for general heart-healthy living and everyday comfort. I like that this one focuses on absorption and includes a broccoli seed complex. Feels like comprehensive antioxidant support for my routine.
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Ladyfingers, Verified Reviewer
What pollen?!
5/5 stars
I took QuercElite this spring and had no issues with pollen. I could certainly see it, but it did not affect me:)
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Grounded, Verified Buyer
You’ve read the labels. You’ve tried the bargain bottles. You know not all supplements are created equal.
QuercElite was designed for people who care about what goes into their body — and how it actually works once it’s there.
*Statements based on ingredient-level studies and formulation design intent. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
Made for Humans Who Don’t Settle
And That's Not All....
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Kevin & L., Verified Buyer
Customer testimonials reflect individual experiences and do not guarantee specific results.
QuercElite is not a medical product and is not intended to diagnose, treat, cure, or prevent any disease. Results may vary. Individual results are not guaranteed.
Please consult your healthcare provider before beginning any new supplement, especially if pregnant, nursing, taking medication, or managing a health condition.
As Seen On:
“It’s earned a permanent spot in my routine.”
— Louis P., Verified Buyer
"I’ve struggled with seasonal stuffiness for years and have tried a lot of options, including other quercetin supplements. Most didn’t agree with me or didn’t seem to help. After reading the reviews, I tried QuercElite and felt noticeably clearer—like I could breathe comfortably again. Very grateful it’s working for me.”
“I’ve always dealt with a ‘can’t-breathe-through-my-nose’ feeling and recurring seasonal flare-ups. Nothing seemed to make a dent. I started QuercElite after a doctor suggested adding quercetin to my routine. Two years later, I’m still impressed—I’ve had smooth, easy-breathing seasons and feel like a comfortable nose-breather now. Wild to me, but I’ll take it.”
✓
Mandie.,Verified Reviewer
"I’ve tried budget and premium quercetin brands. This one emphasizes a patent-pending absorption approach. Whatever they’re doing, I feel a noticeable difference in everyday joint comfort, especially in my left knee. It’s a pricier option, but personally worth it."
✓
Esmeralda344, Verified Buyer
I have been taking this for several weeks and am unsure if I see any benefit. Perhaps it will take a bit longer to see. I will continue to take this and update as needed. For now: no side effects for me, results TBD.
“I began taking QuercElite in October before a December trip. In the past, that time of year meant a lot of sniffles and discomfort for me abroad. This time, my reactions were minimal and infrequent—what a relief. I also liked that I didn’t feel groggy the way I sometimes do with other options.”
It's important to know that we back QuercElite with a 100% SATISFACTION GUARANTEE.
We promise that you will be thrilled with QuercElite. If you decide that we're wrong, then simply send your unused supply back and we'll refund you. It's that simple.
We won't even ask why you're returning it. We'll simply issue you a FULL REFUND for bottles you've purchased within 100 days.
Note: This special guarantee doesn't apply when you purchase through Amazon. It's only "on" when you order QuercElite directly from Mara Labs, including through this page.
We love this product. It’s been gentle on my stomach and easy to swallow. It also helped my son feel more comfortable during seasonal sniffles. We trust this company and have had good experiences with their other products, too.
Unsure of overall effect on health
3/5 stars
Cleared me up
5/5 stars
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Timothy Power, Verified Buyer
Easy to use and I felt clearer during peak seasonal times in both Austin and New England.
Keep refrigerated
3/5 stars
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aguyinca, Verified Reviewer
Surprised by the Results
4/5 stars
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Marcia L., Verified Buyer
I first picked up QuercElite with a bit of a ‘why not, let’s see’ attitude. To my surprise, I’ve felt good using it this year and haven’t reached for other options I normally keep on hand. Glad I gave it a try.
Good alternative brand of Quercetin
5/5 stars
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Kingmo, Verified Buyer
I’ve used quercetin for years. Switching to this brand felt smooth—no issues. The dose is a bit lower than what I used before, but this one focuses on bioavailability, so I figured that could balance things. Solid alternative in my experience.
Claims to have improved bioavailability. Looks like it's made here in the US!
5/5 stars
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Engineer, Deep T., Verified Buyer
I consume quercetin regularly to shore up my immune system. This claims to have an improved bioavailability. I'm not sure if that's due to the particular formulation of quercetin or the broccoli seed extract, but I'm all for improving uptake and bioavailability. According to the bottle it Looks like it's made in the USA!
Good, Clean Quercetin
5/5 stars
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Astrid, Verified Buyer
I’m finding quercetin helpful for staying on top of my wellness. This one feels clean, though it’s on the pricey side. Mine arrived fresh, the capsules are vegan and tasteless, and I like that it includes a broccoli seed complex. Made in Charlottesville, Virginia, which I appreciate.
Calmer, happier skin
5/5 stars
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Pavel, Verified Buyer
I’ve been taking 2 capsules daily with dinner as part of my wellness routine. Since then, my skin has looked calmer and less reactive, which I really appreciate
Seems to be super effective
5/5 stars
I’ve enjoyed adding QuercElite to my day. I notice a steady, natural lift in how I feel at work (I’m a chef and on my feet constantly). I take it after lunch and it’s earned a spot in my routine.
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Louis P. DeLaura II, Verified Buyer
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How do we know you'll like our product?
QuercElite isn’t a generic formula. It’s crafted by Mara Labs, a small, science-driven supplement company known for its integrity and precision...
And trusted by thousands of health-conscious customers.
When you choose QuercElite, you’re choosing a supplement built on rigorous research — not hype you can’t trust:
Science-backed — Quercetin and broccoli seed bioactives (including sulforaphane) are among the most widely researched plant nutrients for supporting cellular defenses and overall wellness.
Transparent — No hidden blends. Every ingredient listed, every batch tested.
Crafted with integrity — Not mass-market. Not private-label. Created with care by a small U.S. company dedicated to doing things right.
The Benefits Of Quercetin Just Got Greater...
When paired with our Broccoli Seed Complex, quercetin doesn’t just get absorbed — it has the chance to work the way nature intended.
Here are some of the most researched areas where quercetin shows promise:
The Truth About Bioavailability....
What is QuercElite?
QuercElite is a dietary supplement from Mara Labs that combines quercetin — a plant flavonoid studied for its antioxidant and cellular health properties — with our proprietary Broccoli Seed Complex (BSC) to support better absorption.
How is QuercElite different from other quercetin supplements?
Quercetin by itself is known for poor absorption. Our Broccoli Seed Complex provides naturally occurring compounds (including sulforaphane) that help more quercetin cross the gut barrier. This means you’re more likely to get the benefits quercetin is known for.
What does quercetin do in the body?
Research suggests quercetin:
- Acts as an antioxidant, helping neutralize free radicals.
- Supports a healthy inflammatory response.
- May help maintain cellular balance and longevity.
- Has been studied for its role in supporting gut barrier integrity.
What are the ingredients?
Each capsule contains:
- Quercetin (plant flavonoid)
- Proprietary Broccoli Seed Complex (with sulforaphane + related compounds)
- Vegetable capsule (cellulose + water)
Each capsule is gluten-free, vegan, and free of fillers or preservatives.
Do I need to take it with food?
You can take QuercElite with or without food. Many people find it easiest with a meal and a glass of water.
What is the suggested dosage?
Take 2 capsules per day (350 mg quercetin). You can take both together, or split the dose between morning and evening.
Why does QuercElite have fewer milligrams per capsule than other quercetin supplements?
Because it’s not about how much you swallow—it’s about how much your body can actually use.
Most quercetin passes right through you. QuercElite pairs quercetin with our proprietary Broccoli Seed Complex to help your body absorb more. That means a lower milligram count on the label can deliver more usable quercetin than higher-dose bottles that don’t absorb well.
In other words: you’re not paying for “more on the label”… you’re paying for a smarter formula that actually works with your body.
How much sulforaphane is in QuercElite?
QuercElite contains 1.5 mg of Stabilized Sulforaphane per capsule.
Are there any side effects?
Quercetin is generally well-tolerated in supplement form. If you’re new to supplements, start with the recommended serving and always take with water. If you take prescription medications, check with your physician first.
Does it interact with medications?
Yes, quercetin and broccoli seed compounds may affect how the liver processes certain drugs (like antibiotics or blood pressure medications). Always consult your physician if you’re on medication.
Does it need to be refrigerated?
Not if you use it daily. For longer storage (especially after opening), refrigeration may help preserve freshness for up to one year.
Does QuercElite expire?
Bottles are best used within one year of production. Once opened, keep the desiccant packet inside and ideally finish within 60 days.
Is there a guarantee?
Yes. We offer a 100-day money-back guarantee if you’re not satisfied with your purchase. Simply send your unused supply back and we'll refund you 100% of what you paid. (Original shipping not refundable.)
Note: QuercElite is not intended to diagnose, treat, cure, or prevent any disease. These benefits are drawn from published research on quercetin and broccoli seed compounds.
Bottom line: With QuercElite, you’re not just taking quercetin — you’re giving it the broccoli seed co-factors it needs to be absorbed and put to work in your body.
Immune Balance
When your body reacts to pollen or dust, it releases little “alarm chemicals” called histamines. They’re what make your eyes water or your nose run.
Quercetin has been shown in studies to help calm the release of histamine.
By making quercetin more bioavailable, QuercElite helps maintain a steady histamine response. This promotes a calm, resilient immune system year-round.
Gut Barrier Strength
Your gut has a natural “wall” made of cells linked together like bricks. The seals between those cells are called tight junctions.
When the junctions loosen, things can slip through that aren’t supposed to.
Research suggests quercetin may help strengthen the seals between cells, so your gut wall stays strong and balanced.
Cell Health & Healthy Aging
As we get older, some of our cells go into a kind of “retirement mode.”
Scientists call these senescent cells — they don’t work well anymore, but they hang around sending out stress signals that can bother healthy cells.
Quercetin has been studied as a senolytic... Which simply means it may help the body clear away retired cells, leaving more room for healthy ones to thrive.
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Connor B., Verified Buyer
“My skin tends to be touchy and get blotchy after hot showers. Since adding QuercElite, my skin looks more even and I’m reaching for the anti-itch cream far less often. 10/10 from me.”
I’m taking this for general wellness support. Hard to measure some benefits, but my eyes/nose have felt calmer lately—could be the season, could be the product. No issues taking it. Note: the bottle says ‘Keep Refrigerated,’ and my bottle expires one year from purchase.
Quality, Care, and Great Service
5/5 stars
✓
Anne W., Verified Buyer
I’ve been taking QuercElite as part of my daily routine and have noticed that I feel calmer, sleep more soundly, and get through seasonal changes more comfortably. I also appreciate that this is a small company dedicated to quality ingredients with fast shipping. I enjoy their newsletters and recipes, and I’ve added BrocElite® and CurcElite® too — I feel like they all support my overall wellness
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Encourages a calm histamine response
Promotes everyday gut comfort
Supports cellular vitality and healthy aging
*Individual results may vary
That’s why QuercElite combines quercetin with our proprietary Broccoli Seed Complex — to help your body absorb and use more.
(Over 2000+ research studies on sulforaphane and its broccoli seed cofactors back us up.)
So even though the milligrams on our label may look lower...
QuercElite is built to deliver more usable quercetin than bottles that don’t absorb well.
The Truth: Most Quercetin Just Passes Through
Helps maintain a healthy inflammatory response
Healthy Inflammatory Response
Inflammation is your body’s way of protecting itself, but sometimes it can run too high for too long.
Quercetin has been studied for helping the body calm down these signals.
Research shows it may help lower common markers of inflammation and support a steadier, more balanced environment inside your cells.
I have finally found relief!
5/5 stars
✓
Kate L., Verified Reviewer
I’ve struggled with seasonal stuffiness for years and have tried a lot of options, including other quercetin supplements. Most didn’t agree with me or didn’t seem to help. After reading the reviews, I tried QuercElite and felt noticeably clearer—like I could breathe comfortably again. Very grateful it’s working for me.
The best that I've tried
5/5 stars
✓
Kevin & L., Verified Buyer
I’ve tried budget and premium quercetin brands. This one emphasizes a patent-pending absorption approach. Whatever they’re doing, I feel a noticeable difference in everyday joint comfort, especially in my left knee. It’s a pricier option, but personally worth it.
My seasonal issues are GONE
5/5 stars
✓
Mandie., Verified Reviewer
I’ve always dealt with a ‘can’t-breathe-through-my-nose’ feeling and recurring seasonal flare-ups. Nothing seemed to make a dent. I started QuercElite after a doctor suggested adding quercetin to my routine. Two years later, I’m still impressed—I’ve had smooth, easy-breathing seasons and feel like a comfortable nose-breather now. Wild to me, but I’ll take it.
No More Annoying Blotchiness
5/5 stars
✓
Connor B., Verified Buyer
My skin tends to be touchy and get blotchy after hot showers. Since adding QuercElite, my skin looks more even and I’m reaching for the anti-itch cream far less often. 10/10 from me.
$49.99
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and Start Feeling the Difference
For people whose body overreacts — to pollen, dust, food, or all three
“I always had breakthrough spring allergies until I started taking a much more bioavailable version of quercetin. Now I don’t even think of myself as having spring allergies anymore.”
- Dr. John Gildea, PhD, co-founder at Mara Labs**
*Results may vary. This statement reflects an individual experience and is not intended to diagnose, treat, cure, or prevent any disease. **Disclosure: Dr. Gildea is a co-founder and paid representative of Mara Labs. His views reflect his personal experience and are not intended as medical advice.