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.

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.

Returns

Incredible0.0%

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

Good6.3%

search→purchase rate — share of searches ending in a sale

Market size

Good$590K

$590K/yr · 419K searches

Competition

Good54%

top-5 click share — leaders hold, buyers still browse

Review moat

Bad6,009.72

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-5.0%

90-day search growth — must beat 0% to launch

Brand share

Bad97%

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

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

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.

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 18.3×

Open Trend

Top quercetin complex search terms

solgar142K/yr -10.2%1.6% conv.
garden of life magnesium39K/yr -18.6%5.6% conv.
solgar magnesium citrate28K/yr -3.7%13.1% conv.
garden of life magnesium glycinate18K/yr -10.3%2.2% conv.
life extension vitamin c18K/yr -10.6%14.9% conv.
garden of life magnesium gummies15K/yr +10.1%10.9% conv.
solgar magnesium19K/yr -19.1%5.9% conv.
solgar vitamins19K/yr -12.3%1.8% conv.
magnesium glycinate garden of life8K/yr +54.6%1.4% conv.
magnesium garden of life8K/yr +61.2%3.0% conv.

All 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.

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

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$13.384.6★15,010 rev

Garden of Life Magnesium with Pre & Probiotics Gummies Raspberry 60 Gummies

Garden of Life$13.904.4★4,261 rev

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$28.294.3★1,859 rev

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$20.464.7★2,756 rev

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$16.854.7★4,504 rev

Newest

by launch date

Life Extension Vitamin C 24-Hour Liposomal Hydrogel Formula 90 Vegetarian Tablets

Life Extension$37.007 rev

6mo ago

THORNE - Magnesium Glycinate - Supports Restful Sleep Muscle Relaxation Heart Health & Metabolism* - Chelated Magnesium Capsules - Third-Party Certified - Gluten Dairy & Soy-Free - 90 Servings

THORNE$25.392,847 rev

1y ago

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$13.84713 rev

3y ago

Garden of Life Magnesium with Pre & Probiotics Gummies Raspberry 60 Gummies

Garden of Life$13.904,261 rev

4y ago

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$21.23520 rev

4y ago

What buyers say about quercetin complex

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall20%

“This was just as effective as other quality brands”

Sleep Quality19%

“Helps me sleep”

Magnesium10%

“Best magnesium supplement Ive had yet”

Vitamin6%

“These are some quality vitamins”

Advertised Vs Actual Product3%

“As advertised”

Value For Money3%

“great value”

Efficiency3%

“Works perfectly”

Stress/Anxiety2%

“less stress”

Regulates Digestion2%

“Easy to digest”

Ease Of Chewing/Swallowing2%

“Plus they are way better than swallowing pills”

What buyers complain about

Sleep Quality12%

“I was having trouble sleeping”

Size-Overall7%

“Very large capsules”

Side Effects6%

“intolerant side effect”

Magnesium6%

“Maybe not pure magnesium glycinate or no quality control”

Quality-Overall5%

“Poor quality control”

Ease Of Chewing/Swallowing4%

“Barely chewable”

Value For Money4%

“Waste of money”

Dosage4%

“or dosage information which has never happened before then come to find out I cant return them”

Functionality-Overall4%

“in my case it just didnt stand out as particularly effective”

Acid Regulator/Stomach Ache Relief3%

“Upset stomach”

Top return reasons

Magnesium20%

Functionality-Overall10%

Value For Money10%

Size-Overall9%

Dosage8%

Acid Regulator/Stomach Ache Relief7%

Sleep Quality7%

Advertised Vs Actual Product5%

Ease Of Chewing/Swallowing5%

Ingredients-Overall3%

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.