Is quercetin with vitamin c profitable to sell on Amazon United States?

The niche generates $239K/yr across 18 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -18.7%. Flapen's verdict: Skip it (47/100).

How competitive is the quercetin with vitamin c niche?

9 brands and 296 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 94% of demand.

What do buyers complain about in quercetin with vitamin c?

Top complaints mined from reviews: Allergies, Side Effects, Value For Money. The return rate is 0.0%.

What does it cost to enter the quercetin with vitamin c niche?

Listings span $7.15–$45.38; the average listing price is $24.71 (sweet spot $15–$100). The average incumbent carries 2,369 reviews — the moat a new listing must climb.

quercetin with vitamin c

Skip it

Brand-locked demand (top 5 brands take 94% of clicks) — this niche doesn't clear our bar today.

Returns

Incredible0.0%

return rate — above 5% kills the launch gate

Conversion

Incredible16.2%

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

Avg price

Incredible$24.71

avg listing price — sweet spot $15–$100

Price range

Great$7.15–$45.38

cheapest to priciest tracked listing — scored on the share inside $15–$100

Market size

Okay$239K

$239K/yr · 60K searches

Review moat

Okay2,368.56

avg incumbent reviews — the moat a new listing must climb

Competition

Okay68%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-18.7%

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

Brand share

Bad94%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, quercetin with vitamin c is a $239K/yr Amazon United States market (60K searches/yr). The top 5 brands hold 94% of demand. Verdict: Skip it — 47/100.

Data updated Jul 29, 2026 · scored weekly · How we score niches

quercetin with vitamin c market data

Units sold / yr: 10K–13K; avg 500–750/product
Revenue / yr: $247K–$309K; units × avg price
Conversion rate: 16.2%
Avg BSR: #408
Page quality: 0%
Prime: 100%
Sponsored: 83%
Out of stock: 0.0%
Avg brand age: 95 months
Avg seller age: 151 days

Competition & brand share

The top 5 products take 68% of clicks — established leaders, but buyers still shop beyond them.

Brands

9 rising

Sellers

296

Top-5 brand share

94%

Top 20: 100%

Top-5 click share

68%

Top 20: 100%

Open market

Life Extension46%
SOLARAY26%
Solgar17%
Integrative Therapeutics4%
ForestLeaf2%
Micro Ingredients2%
Open — no brand owns it (3 brands, 4%)

Demand

Weekly Amazon search volume, last 16 weeks — -18.7% search growth over the last 90 days.

Open Trend

Top quercetin with vitamin c search terms

life extension vitamin c18K/yr -10.6%15.0% conv.
quercetin with vitamin c8K/yr -19.0%5.0% conv.
solaray quercetin5K/yr -20.3%14.8% conv.
quercetin vitamin c4K/yr -23.7%4.7% conv.
solgar quercetin complex with ester-c plus3K/yr -13.5%21.4% conv.
solaray quercetin with bromelain and vitamin c3K/yr -14.1%22.0% conv.
vitamin c life extension4K/yr -14.7%16.5% conv.
vitamin c with quercetin4K/yr -25.4%9.4% conv.
vitamin c quercetin3K/yr -25.2%8.1% conv.
solgar quercetin2K/yr -20.1%16.4% conv.

All search terms

Top quercetin with vitamin c 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 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

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

SOLARAY Quercetin Bromelain & Vitamin C Immune System Sinus Respiratory & Antioxidant Activity Support Vegan 500mg of Quercetin & 1 235mg of VIT C 60 Day Guarantee 75 Servings 150 VegCaps

SOLARAY$31.894.7★2,441 rev

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$21.234.8★520 rev

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

Life Extension$37.005.0★7 rev

Newest

by launch date

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

Life Extension$37.007 rev

6mo ago

SOLARAY Quercetin 500mg Capsules - Antioxidants Supplement - Bioflavonoid and Antioxidant Support for Overall Health and Wellness - Non-GMO Vegan Lab Verified 60-Day Guarantee 180 Servings

SOLARAY$45.383,049 rev

1y ago

Natures Bounty Quercetin Immune Support 500mg With Vitamin C Rose Hips & Rutin 60 count

Nature's Bounty$14.94227 rev

1y ago

SOLARAY Quercetin Phytosome 250 mg 30 VegCaps

SOLARAY$17.55121 rev

3y 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 with vitamin c

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

What buyers love

Quality-Overall17%

“Great quality, easy to swallow”

Vitamin12%

“High quality vitamin that is easy to swallow”

Immunity Booster9%

“this is amazing to keep your immune system strong”

Allergies7%

“Allergy relief”

Efficiency7%

“Works well for my MCAS”

Value For Money5%

“Very reasonable price”

Ingredients-Overall3%

“Affordable Quality Quercetin”

Cold Relief3%

“They are great for staying well from cold season”

Fever Relief3%

“This was so helpful during Austins cedar fever season”

Ease Of Chewing/Swallowing2%

“Easy Digest”

What buyers complain about

Allergies13%

“I had a terrible reaction”

Side Effects12%

“he frequently gets canker sores”

Value For Money7%

“Waste of money”

Dosage6%

“I wish I had taken more”

Quality-Overall5%

“Since their Quality Control seems to be lacking”

Functionality-Overall4%

“Did not work”

Pain Relief-Overall3%

“Caused pain”

Color Fading/Discoloration3%

“However, this bag was a bit discolored in the capsules so I had to contact customer service who told me its a natural oxidation process”

Vitamin3%

“That said, a supplement can only be as good as all of its ingredients”

Size-Overall3%

“Capsules are too large”

Top return reasons

Color50%

Functionality-Overall25%

Value For Money25%

Common questions

Is quercetin with vitamin c profitable to sell on Amazon United States?: The niche generates $239K/yr across 18 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -18.7%. Flapen's verdict: Skip it (47/100).
How competitive is the quercetin with vitamin c niche?: 9 brands and 296 sellers compete. The top 5 products take 68% of clicks and top 5 brands hold 94% of demand.
What do buyers complain about in quercetin with vitamin c?: Top complaints mined from reviews: Allergies, Side Effects, Value For Money. The return rate is 0.0%.
What does it cost to enter the quercetin with vitamin c niche?: Listings span $7.15–$45.38; the average listing price is $24.71 (sweet spot $15–$100). The average incumbent carries 2,369 reviews — the moat a new listing must climb.