uc ii
Worth a lookShows low returns (0.0%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible12.0%search→purchase rate — share of searches ending in a sale
Avg price
Incredible$26.64avg listing price — sweet spot $15–$100
Price range
Incredible$14.90–$39.76cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$481K$481K/yr · 150K searches
Review moat
Good1,444.91avg incumbent reviews — the moat a new listing must climb
Growth
Okay+11.8%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Bad78%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, uc ii is a $481K/yr Amazon United States market (150K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug. Verdict: Worth a look — 52/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
uc ii market data
- Units sold / yr
- 15K–20K
- avg 1,250–1,500/product
- Revenue / yr
- $400K–$533K
- units × avg price
- Conversion rate
- 12.0%
- Avg BSR
- #359
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 82%
- Out of stock
- 0.0%
- Avg brand age
- 71 months
- Avg seller age
- 152 days
Competition & brand share
The top 5 products capture 78% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 falling
Sellers
24
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
78%
Top 20: 100%
Open market
0%
- NOW Foods63%
- Healthy Origins16%
- Naturalis11%
- Nutricost7%
- Bronson3%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +11.8% search growth over the last 90 days.Peak months: Aug · busiest ÷ quietest = 2.2×
Top uc ii search terms
- uc ii43K/yr
- uc ii collagen33K/yr
- undenatured type ii collagen11K/yr
- uc-ii collagen13K/yr
- uc29K/yr
- undenatured type 2 collagen14K/yr
- ucii8K/yr
- uc-ii collagen for joints6K/yr
- uc2 collagen7K/yr
- uc 2 collagen5K/yr
Top uc ii 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 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
NOW Foods Supplements UC-II Type II Collagen with Undenatured Type II Collagen 120 Veg Capsules
NOW Foods$34.234.6★4,426 rev
NOW Foods Supplements UC-II Type II Collagen with Undenatured Type II Collagen 60 Veg Capsules
NOW Foods$19.404.6★4,426 rev
Healthy Origins UC-II 40 mg 120 Veggie Capsules - Featuring Clinically Studied Undenatured Type II Collagen - Supports Joint Comfort Mobility & Flexibility - Non-GMO & Gluten-Free - 2 Month Supply
Healthy Origins$32.004.4★2,484 rev
Nutricost UC-II Collagen 40mg 120 Capsules Gluten-Free GMO-Free
Nutricost$32.764.7★58 rev
Naturalis UC-II 40 mg 120 Softgels | Joint Health Mobility & Flexibility*
Naturalis$39.764.6★192 rev
Newest
by launch dateNutricost UC-II Collagen 40mg 120 Capsules Gluten-Free GMO-Free
Nutricost$32.7658 rev
Now Pets UC-II Advanced Joint Mobility for Dogs and Cats Veterinarian formulated Help Maintain Cartilage and Connective Tissue* 60 Chewable Tablets (60 Grams)
NOW Foods$18.68174 rev
Naturalis UC-II 40 mg 120 Softgels | Joint Health Mobility & Flexibility*
Naturalis$39.76192 rev
Naturalis UC-II 40 mg 60 Softgels | Joint Health Mobility & Flexibility*
Naturalis$22.95192 rev
NOW Supplements UC-II Advanced Joint Relief with Undenatured Type II Collagen plus Hyaluronic Acid Boron Vitamin D-3 60 Veg Capsules
NOW Foods$22.86654 rev
Trending
90-day click momentumNutricost UC-II Collagen 40mg 120 Capsules Gluten-Free GMO-Free
Nutricost$32.764.7★
Naturalis UC-II 40 mg 120 Softgels | Joint Health Mobility & Flexibility*
Naturalis$39.764.6★
NOW Foods Supplements UC-II Type II Collagen with Undenatured Type II Collagen 60 Veg Capsules
NOW Foods$19.404.6★
Healthy Origins UC-II 40 mg 120 Veggie Capsules - Featuring Clinically Studied Undenatured Type II Collagen - Supports Joint Comfort Mobility & Flexibility - Non-GMO & Gluten-Free - 2 Month Supply
Healthy Origins$32.004.4★
Now Pets UC-II Advanced Joint Mobility for Dogs and Cats Veterinarian formulated Help Maintain Cartilage and Connective Tissue* 60 Chewable Tablets (60 Grams)
NOW Foods$18.684.4★
What buyers say about uc ii
What buyers praise and complain about, mined from review topics.What buyers love
“helps with joints for me”
“Good quality”
“the small capsule is easy to take”
“Good product, reasonable price”
“Makes daily use simple”
“Vitamin”
“a mineral rich complex that contributes calcium”
“It works for me”
“Easy once-a-day capsule”
“no noticeable side effects”
What buyers complain about
“Not as effective as other UC-II I have taken”
“That is poor quality control”
“Its expensive,”
“Doesn't work”
“Calcium Oxalate Kidney Stones can form in susceptible individuals”
“Has not helped my joints”
“upsets my stomach”
“The product page for these clearly says that it's a "Vegetarian product", but it is NOT.”
“It smells kind of not great”
“It was horrible as I could taste the powdered texture - ruining the drink itself”
Top return reasons
Common questions
- Is uc ii profitable to sell on Amazon United States?
- The niche generates $481K/yr across 11 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +11.8%. Flapen's verdict: Worth a look (52/100).
- How competitive is the uc ii niche?
- 5 brands and 24 sellers compete. The top 5 products take 78% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in uc ii?
- Top complaints mined from reviews: Dosage, Quality-Overall, Value For Money. The return rate is 0.0%.
- When does demand for uc ii peak?
- Demand peaks in Aug; the busiest month runs 2.2× the quietest.
- What does it cost to enter the uc ii niche?
- Listings span $14.90–$39.76; the average listing price is $26.64 (sweet spot $15–$100). The average incumbent carries 1,445 reviews — the moat a new listing must climb.