---
title: "Flavonoids — $403K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/flavonoids"
last_updated: "2026-08-10T21:12:53.531Z"
locale: en
meta:
description: "Niche score 57/100 · $403K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 57/100 · $403K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Flavonoids — $403K/yr Amazon US Niche (2026) - Flapen"
---
# **flavonoids**
**Worth a look**
Shows low returns (0.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 56Growth 20Conversion 80Competition 34Returns 100Price range 84Avg price 95Brand share 55Review moat 36Quality gap 65
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$25.68**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$9.23–$50.51**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Great****8.3%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$403K**
$403K/yr · 190K searches
**Brand share**
**Good****72%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Okay****2,868.2**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****65%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-10.0%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, flavonoids is a $403K/yr Amazon United States market (190K searches/yr). The top 5 brands hold 72% of demand. Demand peaks in Mar–Apr–May–Jun. Verdict: Worth a look — 57/100.
Data updated Jul 25, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **flavonoids market data**
- **Units sold / yr**
- **15K–20K**
- avg 750–1,000/product
- **Revenue / yr**
- **$385K–$514K**
- units × avg price
- **Conversion rate**
- **8.3%**
- **Avg BSR**
- **#645**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **65%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **81 months**
- **Avg seller age**
- **148 days**
## **Competition & brand share**
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **—flat
**Sellers**
**87**
**Top-5 brand share**
**72%**
Top 20: 100%
**Top-5 click share**
**65%**
Top 20: 100%
**Open market**
**23%**
- NOW Foods30% - Horbäach17% - Swanson13% - Lipo-Flavonoid7% - Black Forest5% - Clenoriko5%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -10.0% search growth over the last 90 days.
4K3KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Apr, May, Jun · busiest ÷ quietest = 2.5×
[**Open Trend **](https://flapen.com/research/us/health-household/flavonoids/trend)
## **Top flavonoids search terms**
- **bioflavonoids**31K/yr-3.4%4.8% conv. - **citrus bioflavonoids**26K/yr+34.6%10.0% conv. - **flavonoids**26K/yr-7.5%4.3% conv. - **flavonoids supplements**34K/yr-33.5%4.6% conv. - **bioflavonoids supplements**20K/yr-3.3%4.7% conv. - **citrus bioflavonoids supplement**8K/yr+11.0%12.3% conv. - **flavonoid antioxidant supplements**6K/yr-22.2%1.4% conv. - **flavonoid**10K/yr-47.1%4.7% conv. - **lemon bioflavonoids**5K/yr-6.7%9.7% conv. - **flavonoids for hemorrhoids**7K/yr-31.8%2.8% conv. [**All search terms **](https://flapen.com/research/us/health-household/flavonoids/search-terms)
## **Top flavonoids 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%$40K20%$81K30%$121K40%$161K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**NOW Supplements Citrus Bioflavonoids 700mg Supports Immune System* Cell Defense* 100 Capsules**NOW Foods**$9.23**4.5★1,594 rev](https://www.amazon.com/dp/B001F0QVX4) [2**Horbach Citrus Bioflavonoids Complex | 1500mg | 300 Coated Caplets**Horbäach**$22.35**4.4★593 rev](https://www.amazon.com/dp/B08YRWXTPY) [3**Swanson Full Spectrum Citrus Bioflavonoid Complex Immune and Antioxidant Supplement for Adults Seeking Enhanced Vitamin C Absorption - 50% Standardized (250 Capsules)**Swanson**$21.93**4.6★584 rev](https://www.amazon.com/dp/B076WYZVWX) [4**Black Forest High Flavanol Cocoa Powder - 1200mg Flavanols & Flavonoids with 600mg Epicatechin - 10X Concentrated Dark Cocoa Extract for Nitric Oxide and Wellness Support - Non-GMO Vegan**Black Forest**$40.77**4.4★2,461 rev](https://www.amazon.com/dp/B0CTJ67LK1) [5**Clenoriko Citrus Bioflavonoids 1000mg with Quercetin & Rutin - Bioflavonoids for Antioxidant & Circulation* Flavonoids Supplements - Standardized to 50% Hesperidin 120 Capsules (60-Day Supply)**Clenoriko**$23.38**4.6★20 rev](https://www.amazon.com/dp/B0H1BRP9Y5)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Clenoriko Citrus Bioflavonoids 1000mg with Quercetin & Rutin - Bioflavonoids for Antioxidant & Circulation* Flavonoids Supplements - Standardized to 50% Hesperidin 120 Capsules (60-Day Supply)**Clenoriko**$23.38**20 rev2mo ago](https://www.amazon.com/dp/B0H1BRP9Y5) [**Gyumolics Flavonoid Supplement Gummies 3000mg Bioflavonoid Complex with Hesperidin Quercetin Lemon Bioflavonoids & Vitamin C 60 Gummies**Gyumolics**$20.40**211 rev1y ago](https://www.amazon.com/dp/B0FJRKCKLV) [**Black Forest High Flavanol Cocoa Powder - 1200mg Flavanols & Flavonoids with 600mg Epicatechin - 10X Concentrated Dark Cocoa Extract for Nitric Oxide and Wellness Support - Non-GMO Vegan**Black Forest**$40.77**2,461 rev1y ago](https://www.amazon.com/dp/B0CTJ67LK1) [**Flavonoids 60 days Support Healthy Circulation Veins Capillaries and Lymphatic Drainage- MPFF- Micronized Diosmin 150mg + Hesperidin 150mg + Horse Chestnut150 mg- GMP Certificate vegan**PureLife Nutrition**$28.85**156 rev3y ago](https://www.amazon.com/dp/B0C4Y57ZPX) [**LIPO Balance Support Supplement for Dizziness & Vertigo - Inner Ear Health & Circulation Formula with Ginkgo Biloba Vitamin D & B Complex - Supports Balance & Stability - 30 Ct**Lipo-Flavonoid**$19.54**2,364 rev3y ago](https://www.amazon.com/dp/B07GTJ3DSV)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Clenoriko Citrus Bioflavonoids 1000mg with Quercetin & Rutin - Bioflavonoids for Antioxidant & Circulation* Flavonoids Supplements - Standardized to 50% Hesperidin 120 Capsules (60-Day Supply)**Clenoriko**$23.38**4.6★**▲ 324%**](https://www.amazon.com/dp/B0H1BRP9Y5) [**CocoaVia Ultra 750mg Cocoa Flavanols Heart & Brain Support Memory & Blood Circulation Booster High Flavanol Cocoa for Nitric Oxide Energy & Oxygen Boost Vegan Gluten-Free 30-Day Supply**CocoaVia**$50.51**4.3★**▲ 236%**](https://www.amazon.com/dp/B08DLQ67ZL) [**Vein Formula Diosmin Hesperidin 1000mg Micronized Bioflavonoids Blend for Blood Circulation Vein Support MPFF Supplement for Circulation in legs and feet and Healthy Blood Flow Support 60 Capsules**VITASUPPORTMD**$46.77**4.5★**▲ 61%**](https://www.amazon.com/dp/B09KD8H8WZ) [**Black Forest High Flavanol Cocoa Powder - 1200mg Flavanols & Flavonoids with 600mg Epicatechin - 10X Concentrated Dark Cocoa Extract for Nitric Oxide and Wellness Support - Non-GMO Vegan**Black Forest**$40.77**4.4★**▲ 48%**](https://www.amazon.com/dp/B0CTJ67LK1) [**Klaire Labs SFI Health Bioflavonoid Complex - Immune Cardiovascular & Antioxidant Support Supplement with Citrus Bioflavonoids Quercetin & Rutin (120 Capsules)**SFI Health**$30.90**4.5★**▲ 46%**](https://www.amazon.com/dp/B00HVOSF5U)
**~~View all trending →~~**
## **What buyers say about flavonoids**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**22%
*“Smooth taste”*
**Quality-Overall**15%
*“Amazing quality”*
**Flavor**8%
*“Authentic flavor”*
**Energy Level**5%
*“Boost of energy”*
**Value For Money**4%
*“Reasonable price”*
**Solubility**4%
*“It mixes well”*
**Advertised Vs Actual Product**4%
*“As advertise”*
**Health Benefits-Overall**4%
*“Great healthy product”*
**Nutritional Content**3%
*“Healthy Supplement”*
**Ingredients-Overall**3%
*“Healthy ingredients”*
### **What buyers complain about **
**Functionality-Overall**29%
*“Did not work”*
**Value For Money**9%
*“Way overpriced”*
**Taste-Overall**8%
*“Awful taste”*
**Bitter**4%
*“Bitter”*
**Advertised Vs Actual Product**4%
*“did not work like it advertised”*
**Dosage**3%
*“Dosen't work”*
**Side Effects**3%
*“it made me dizzy”*
**Ingredients-Overall**2%
*“This product is not formulated or labeled that way”*
**Quality-Overall**2%
*“Garbage”*
**Flavor**2%
*“this one takes the cake on having the worst flavor possible”*
### **Top return reasons **
**Functionality-Overall**20%
**Acid Regulator/Stomach Ache Relief**10%
**Size-Overall**10%
**Ease Of Chewing/Swallowing**10%
**Certifications**10%
**Stain Resistance**10%
**Value For Money**10%
**Vitamin**10%
**Texture/Consistency-Overall**5%
**Color**5%
## **Common questions**
- **Is flavonoids profitable to sell on Amazon United States?**
- The niche generates $403K/yr across 20 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -10.0%. Flapen's verdict: Worth a look (57/100).
- **How competitive is the flavonoids niche?**
- 15 brands and 87 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 72% of demand.
- **What do buyers complain about in flavonoids?**
- Top complaints mined from reviews: Functionality-Overall, Value For Money, Taste-Overall. The return rate is 0.0%.
- **When does demand for flavonoids peak?**
- Demand peaks in Mar–Apr–May–Jun; the busiest month runs 2.5× the quietest.
- **What does it cost to enter the flavonoids niche?**
- Listings span $9.23–$50.51; the average listing price is $25.68 (sweet spot $15–$100). The average incumbent carries 2,868 reviews — the moat a new listing must climb.
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