---
title: "Quercetin Complex — $590K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/quercetin-complex"
last_updated: "2026-08-11T21:47:33.833Z"
locale: en
meta:
description: "Niche score 50/100 · $590K/yr market. Brand-locked demand (top 5 brands take 97% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · $590K/yr market. Brand-locked demand (top 5 brands take 97% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Quercetin Complex — $590K/yr Amazon US Niche (2026) - Flapen"
---
# **quercetin complex**
**Worth a look**
Shows low returns (0.0%), but brand-locked demand (top 5 brands take 97% of clicks) keeps it on the watch list.
Market size 64Growth 22Conversion 69Competition 52Returns 100Price range 76Avg price 93Brand share 6Review moat 24Quality gap 23
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****$22.24**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$7.15–$40.97**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$590K**
$590K/yr · 419K searches
**Competition**
**Good****54%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****6,009.72**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Bad****-5.0%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****97%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, quercetin complex is a $590K/yr Amazon United States market (419K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 50/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **quercetin complex market data**
- **Units sold / yr**
- **30K–40K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **$667K–$890K**
- units × avg price
- **Conversion rate**
- **6.3%**
- **Avg BSR**
- **#288**
- **Page quality**
- **0%**
- **Prime**
- **97%**
- **Sponsored**
- **79%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **72 months**
- **Avg seller age**
- **144 days**
## **Competition & brand share**
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**7 **—flat
**Sellers**
**606**
**Top-5 brand share**
**97%**
Top 20: 100%
**Top-5 click share**
**54%**
Top 20: 89%
**Open market**
**1%**
- Solgar53% - Garden of Life25% - Life Extension13% - SOLARAY5% - Pure Encapsulations1% - THORNE1% - Open — no brand owns it (1 brand, 1%)
## **Demand & seasonality**
Weekly Amazon search volume, last 52 weeks — -5.0% search growth over the last 90 days.
10K6KSpike '25Spike '26 seasonAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 18.3×
[**Open Trend **](https://flapen.com/research/us/health-household/quercetin-complex/trend)
## **Top quercetin complex search terms**
- **solgar**142K/yr-10.2%1.6% conv. - **garden of life magnesium**39K/yr-18.6%5.6% conv. - **solgar magnesium citrate**28K/yr-3.7%13.1% conv. - **garden of life magnesium glycinate**18K/yr-10.3%2.2% conv. - **life extension vitamin c**18K/yr-10.6%14.9% conv. - **garden of life magnesium gummies**15K/yr+10.1%10.9% conv. - **solgar magnesium**19K/yr-19.1%5.9% conv. - **solgar vitamins**19K/yr-12.3%1.8% conv. - **magnesium glycinate garden of life**8K/yr+54.6%1.4% conv. - **magnesium garden of life**8K/yr+61.2%3.0% conv. [**All search terms **](https://flapen.com/research/us/health-household/quercetin-complex/search-terms)
## **Top quercetin complex products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$59K20%$118K30%$177K40%$236K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Solgar Magnesium Citrate 120 Tablets - Promotes Healthy Bones - Supports Nerve & Muscle Function - Non GMO Vegan Gluten Free Dairy Free Kosher - 60 Servings Standard Packaging**Solgar**$13.38**4.6★15,010 rev](https://www.amazon.com/dp/B012T97SDQ) [2**Garden of Life Magnesium with Pre & Probiotics Gummies Raspberry 60 Gummies**Garden of Life**$13.90**4.4★4,261 rev](https://www.amazon.com/dp/B09KCMXXXF) [3**Garden of Life Dr. Formulated Whole Food Magnesium Complex Powder with Probiotics Stress & Sleep Support Non-GMO Gluten-Free Vegan Raspberry Lemon Flavor 85 Servings**Garden of Life**$28.29**4.3★1,859 rev](https://www.amazon.com/dp/B079D3X1Z3) [4**Life Extension Vitamin C and Bio-Quercetin Cardiovascular Health Supplement Immune Support Highly absorbable quercetin Vitamin C Gluten Free Non-GMO Vegetarian 250 Tablets**Life Extension**$20.46**4.7★2,756 rev](https://www.amazon.com/dp/B07KVX6B5N) [5**Solgar Quercetin Complex with Ester-C Plus 100 Vegetable Capsules - Supports Immune Health Antioxidant - Gentle on the Stomach Vitamin C - Non-GMO Vegan Gluten/Dairy Free - 50 Servings**Solgar**$16.85**4.7★4,504 rev](https://www.amazon.com/dp/B00012NKRC)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Life Extension Vitamin C 24-Hour Liposomal Hydrogel Formula 90 Vegetarian Tablets**Life Extension**$37.00**7 rev6mo ago](https://www.amazon.com/dp/B0GF3Y6LLV) [**THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings**THORNE**$25.39**2,847 rev1y ago](https://www.amazon.com/dp/B0F5XYHRPV) [**Garden of Life Magnesium Citrate Supplement Gummies with Prebiotics & Probiotics for Stress Sleep & Recovery - Vegan Gluten Free Kosher Non-GMO No Added Sugars Orange Cream Flavor 60 Count**Garden of Life**$13.84**713 rev3y ago](https://www.amazon.com/dp/B0BHM6KPKT) [**Garden of Life Magnesium with Pre & Probiotics Gummies Raspberry 60 Gummies**Garden of Life**$13.90**4,261 rev4y ago](https://www.amazon.com/dp/B09KCMXXXF) [**Life Extension Vitamin C 24-Hour Liposomal Hydrogel Formula absorbs Better Than Standard Vitamin C up to 24 Hours get The Most Out of Your Vitamin C Gluten-Free Non-GMO Vegetarian 60 Tablets**Life Extension**$21.23**520 rev4y ago](https://www.amazon.com/dp/B09GW7PCFZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Life Extension Vitamin C 24-Hour Liposomal Hydrogel Formula 90 Vegetarian Tablets**Life Extension**$37.00**5.0★**▲ 142%**](https://www.amazon.com/dp/B0GF3Y6LLV) [**Life Extension Vitamin C and Bio-Quercetin Cardiovascular Health Supplement Immune Support Highly absorbable quercetin Vitamin C Gluten Free Non-GMO Vegetarian 60 Tablets**Life Extension**$7.15**4.7★**▲ 77%**](https://www.amazon.com/dp/B07KVXRSTW) [**Solgar Glucosamine Hyaluronic Acid Chondroitin MSM 120 Tablets - Supports Healthy Joints - Supports Range of Motion & Flexibility - Extra Strength Shellfish Free - Non-GMO Gluten Free - 40 Servings**Solgar**$36.79**4.5★**▲ 70%**](https://www.amazon.com/dp/B0028H5XBO) [**Solgar Gentle Iron 180 Vegetable Capsules - Ideal for Sensitive Stomachs - Non-Constipating - Red Blood Cell Supplement - Non GMO Vegan Gluten-Free Dairy Free Kosher - 180 Servings**Solgar**$16.29**4.7★**▲ 64%**](https://www.amazon.com/dp/B0001OP028) [**THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings**THORNE**$25.39**4.7★**▲ 16%**](https://www.amazon.com/dp/B0F5XYHRPV)
**~~View all trending →~~**
## **What buyers say about quercetin complex**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“This was just as effective as other quality brands”*
**Sleep Quality**19%
*“Helps me sleep”*
**Magnesium**10%
*“Best magnesium supplement Ive had yet”*
**Vitamin**6%
*“These are some quality vitamins”*
**Advertised Vs Actual Product**3%
*“As advertised”*
**Value For Money**3%
*“great value”*
**Efficiency**3%
*“Works perfectly”*
**Stress/Anxiety**2%
*“less stress”*
**Regulates Digestion**2%
*“Easy to digest”*
**Ease Of Chewing/Swallowing**2%
*“Plus they are way better than swallowing pills”*
### **What buyers complain about **
**Sleep Quality**12%
*“I was having trouble sleeping”*
**Size-Overall**7%
*“Very large capsules”*
**Side Effects**6%
*“intolerant side effect”*
**Magnesium**6%
*“Maybe not pure magnesium glycinate or no quality control”*
**Quality-Overall**5%
*“Poor quality control”*
**Ease Of Chewing/Swallowing**4%
*“Barely chewable”*
**Value For Money**4%
*“Waste of money”*
**Dosage**4%
*“or dosage information which has never happened before then come to find out I cant return them”*
**Functionality-Overall**4%
*“in my case it just didnt stand out as particularly effective”*
**Acid Regulator/Stomach Ache Relief**3%
*“Upset stomach”*
### **Top return reasons **
**Magnesium**20%
**Functionality-Overall**10%
**Value For Money**10%
**Size-Overall**9%
**Dosage**8%
**Acid Regulator/Stomach Ache Relief**7%
**Sleep Quality**7%
**Advertised Vs Actual Product**5%
**Ease Of Chewing/Swallowing**5%
**Ingredients-Overall**3%
## **Common questions**
- **Is quercetin complex profitable to sell on Amazon United States?**
- The niche generates $590K/yr across 29 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -5.0%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the quercetin complex niche?**
- 7 brands and 606 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 97% of demand.
- **What do buyers complain about in quercetin complex?**
- Top complaints mined from reviews: Sleep Quality, Size-Overall, Side Effects. The return rate is 0.0%.
- **When does demand for quercetin complex peak?**
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 18.3× the quietest.
- **What does it cost to enter the quercetin complex niche?**
- Listings span $7.15–$40.97; the average listing price is $22.24 (sweet spot $15–$100). The average incumbent carries 6,010 reviews — the moat a new listing must climb.
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