quercetin
Worth a lookShows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Great12.0%search→purchase rate — share of searches ending in a sale
Avg price
Great£16.75avg listing price — sweet spot $15–$100
Price range
Good£4.19–£44.13cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good880avg incumbent reviews — the moat a new listing must climb
Brand share
Good67%top-5 brand share — brands hold most of the demand
Market size
Good£325K£325K/yr · 162K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay61%top-5 click share — leaders hold, buyers still browse
Growth
Bad-11.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, quercetin is a £325K/yr Amazon United Kingdom market (162K searches/yr). The top 5 brands hold 67% of demand. Verdict: Worth a look — 58/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
quercetin market data
- Units sold / yr
- 15K–20K
- avg 750–1,000/product
- Revenue / yr
- £251K–£335K
- units × avg price
- Conversion rate
- 12.0%
- Avg BSR
- #40
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 96%
- Out of stock
- 2.3%
- Avg brand age
- 54 months
- Avg seller age
- 174 days
Competition & brand share
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.Brands
21 rising
Sellers
28
Top-5 brand share
67%
Top 20: 99%
Top-5 click share
61%
Top 20: 97%
Open market
28%
- Solgar21%
- NEW LEAF PRODUCTS13%
- ALPHA0112%
- Shivay Herbals11%
- WeightWorld10%
- Nutravita5%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -11.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top quercetin search terms
- quercetin114K/yr
- quercetin supplement35K/yr
- quercetin phytosome4K/yr
- quercetin complex4K/yr
- quercitin2K/yr
- quercetin 500mg3K/yr
Top quercetin 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.
All 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Solgar Quercetin Complex Vegetable Capsules - Pack of 50 - Supports Immunity and Protects from Oxidative Stress - with Ester Vitamin C and Bromelain - Vegan and Gluten Free
Solgar£10.804.6★5,358 rev
Quercetin 500mg High Strength Antioxidant Supplements (6 Months Supply) 180 Vegan Pure Quercetin Capsules Easy to Swallow - One A Day - Gluten Free & Non-GMO Made in UK by New Leaf
NEW LEAF PRODUCTS£11.994.6★965 rev
Plant-Based Quercetin 800mg & Bromelain 396 GDU with BioPerine - 120 Vegan Capsules Made from Sophora Japonica Extract & Pineapple by Alpha01
ALPHA01£8.154.6★293 rev
Pure Quercetin (Sophora Japonica) Supplement |1000mg Per Serving | 180 Vegan Capsules - 3 Month Supply | Natural Antioxidant | Made in The UK by Shivay Herbals
Shivay Herbals£8.244.4★167 rev
Quercetin Supplement 1000mg - 180 Quercetin Capsules - 3 Months Supply - Sourced from Sophora Japonica - 2 Capsules per Day - Non-GMO & Magnesium Stearate-Free - Vegan-Friendly Flavonoids Supplements
WeightWorld£14.294.5★1,566 rev
Newest
by launch date
Pure Organic Quercetin - High Potency Quercetin Supplement for Antioxidant Support - Organic Quercitin Antioxidant Supplements for Immune Health & Energy Boost
NEO-NUTRITION£7.8210 rev
Vegavero Quercetin 1000 mg | with Vitamin C Bromelain and Piperine | 95% Sophora Japonica Extract | Antioxidant Anti-inflammatory and Immune System | NO Additives | Vegan
Vegavero£18.16200 rev
Pure Encapsulations Quercetin 250mg - Natural Plant-Source Pure Quercetin Supplement - Promotes Immune Support Cardiometabolic Health and Overall Cellular Health - 120 Vegetarian Capsules
Pure Encapsulations£44.1325 rev
Nature Provides Quercetin Phytosome (Quercefit) Bromelain 60 Vegan Caps
Nature Provides£23.0649 rev
Pure Quercetin (Sophora Japonica) Supplement |1000mg Per Serving | 180 Vegan Capsules - 3 Month Supply | Natural Antioxidant | Made in The UK by Shivay Herbals
Shivay Herbals£8.24167 rev
Trending
90-day click momentumPure Encapsulations Quercetin 250mg - Natural Plant-Source Pure Quercetin Supplement - Promotes Immune Support Cardiometabolic Health and Overall Cellular Health - 120 Vegetarian Capsules
Pure Encapsulations£44.134.3★
Pure Organic Quercetin - High Potency Quercetin Supplement for Antioxidant Support - Organic Quercitin Antioxidant Supplements for Immune Health & Energy Boost
NEO-NUTRITION£7.824.6★
Quercetin Bromelain Supplement | 60 Capsules -30 Servings | Powerful Antioxidant | 1000mg Quercetin (from Sophora Japonica) and 500 GDU Bromelain (from Pineapple) per Serving | Love Life Supplements
LOVE LIFE SUPPLEMENTS£23.554.4★
Plant-Based Quercetin 800mg & Bromelain 396 GDU with BioPerine - 120 Vegan Capsules Made from Sophora Japonica Extract & Pineapple by Alpha01
ALPHA01£8.154.6★
Nature Provides Quercetin Phytosome (Quercefit) Bromelain 60 Vegan Caps
Nature Provides£23.064.6★
What buyers say about quercetin
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality quercetin supplement”
“Good value for money”
“Allergy symptoms for pollen kept at bay”
“Zero side effects which is huge for me”
“Nice supplement easy to swallow”
“Great supplement noticed a good lift in energy”
“Easy to swallow”
“does the job”
“Does the job and good value”
“Bioavailable - value”
What buyers complain about
“Caused me stomach pain”
“Very expensive”
“I have histamine intolerance”
“This upset my stomach for the days I took it”
“on average only around 2%-20% of it gets absorbed”
“This left me feeling a bit agitated”
“Didnt seem to do anything at all”
“Waste of money for me as no improvement which could not be obtained from a balanced diet provides”
“Not as good as my usual brand”
“Too much Benzene”
Common questions
- Is quercetin profitable to sell on Amazon United Kingdom?
- The niche generates £325K/yr across 23 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -11.9%. Flapen's verdict: Worth a look (58/100).
- How competitive is the quercetin niche?
- 21 brands and 28 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 67% of demand.
- What do buyers complain about in quercetin?
- Top complaints mined from reviews: Acid Regulator/Stomach Ache Relief, Value For Money, Allergies. The return rate is 0.1%.
- When does demand for quercetin peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the quercetin niche?
- Listings span £4.19–£44.13; the average listing price is £16.75 (sweet spot $15–$100). The average incumbent carries 880 reviews — the moat a new listing must climb.