---
title: "Uc Ii — $481K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/uc-ii"
last_updated: "2026-08-06T14:56:23.918Z"
locale: en
meta:
description: "Niche score 52/100 · $481K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $481K/yr market. Brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Uc Ii — $481K/yr Amazon US Niche (2026) - Flapen"
---
# **uc ii**
**Worth a look**
Shows low returns (0.0%), but brand-locked demand (top 5 brands take 100% of clicks) keeps it on the watch list.
Market size 59Growth 40Conversion 95Competition 18Returns 100Price range 95Avg price 95Brand share 0Review moat 51Quality gap 33
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.0%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$26.64**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$14.90–$39.76**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Good****$481K**
$481K/yr · 150K searches
**Review moat**
**Good****1,444.91**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Okay****+11.8%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****78%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
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 ~~](https://flapen.com/research/methodology)
## **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.
9K7KSpike '24Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Aug · busiest ÷ quietest = 2.2×
[**Open Trend **](https://flapen.com/research/us/health-household/uc-ii/trend)
## **Top uc ii search terms**
- **uc ii**43K/yr+48.8%14.1% conv. - **uc ii collagen**33K/yr-32.6%7.2% conv. - **undenatured type ii collagen**11K/yr+63.8%5.7% conv. - **uc-ii collagen**13K/yr+0.4%7.8% conv. - **uc2**9K/yr+30.9%6.3% conv. - **undenatured type 2 collagen**14K/yr-42.3%5.6% conv. - **ucii**8K/yr+26.2%7.3% conv. - **uc-ii collagen for joints**6K/yr+31.0%9.9% conv. - **uc2 collagen**7K/yr-6.6%6.5% conv. - **uc 2 collagen**5K/yr+12.5%5.5% conv. [**All search terms **](https://flapen.com/research/us/health-household/uc-ii/search-terms)
## **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.
0%10%$48K20%$96K30%$144K40%$192K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**NOW Foods Supplements UC-II Type II Collagen with Undenatured Type II Collagen 120 Veg Capsules**NOW Foods**$34.23**4.6★4,426 rev](https://www.amazon.com/dp/B014MHI0P8) [2**NOW Foods Supplements UC-II Type II Collagen with Undenatured Type II Collagen 60 Veg Capsules**NOW Foods**$19.40**4.6★4,426 rev](https://www.amazon.com/dp/B0028J6NRU) [3**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**$32.00**4.4★2,484 rev](https://www.amazon.com/dp/B06XW695RT) [4**Nutricost UC-II Collagen 40mg 120 Capsules Gluten-Free GMO-Free**Nutricost**$32.76**4.7★58 rev](https://www.amazon.com/dp/B0G457SS6C) [5**Naturalis UC-II 40 mg 120 Softgels | Joint Health Mobility & Flexibility***Naturalis**$39.76**4.6★192 rev](https://www.amazon.com/dp/B0F1SSHN95)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Nutricost UC-II Collagen 40mg 120 Capsules Gluten-Free GMO-Free**Nutricost**$32.76**58 rev8mo ago](https://www.amazon.com/dp/B0G457SS6C) [**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**$18.68**174 rev3y ago](https://www.amazon.com/dp/B0C41RWGN7) [**Naturalis UC-II 40 mg 120 Softgels | Joint Health Mobility & Flexibility***Naturalis**$39.76**192 rev5y ago](https://www.amazon.com/dp/B0F1SSHN95) [**Naturalis UC-II 40 mg 60 Softgels | Joint Health Mobility & Flexibility***Naturalis**$22.95**192 rev5y ago](https://www.amazon.com/dp/B0F1SVJWVL) [**NOW Supplements UC-II Advanced Joint Relief with Undenatured Type II Collagen plus Hyaluronic Acid Boron Vitamin D-3 60 Veg Capsules**NOW Foods**$22.86**654 rev7y ago](https://www.amazon.com/dp/B07G19KYQC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Nutricost UC-II Collagen 40mg 120 Capsules Gluten-Free GMO-Free**Nutricost**$32.76**4.7★**▲ 56%**](https://www.amazon.com/dp/B0G457SS6C) [**Naturalis UC-II 40 mg 120 Softgels | Joint Health Mobility & Flexibility***Naturalis**$39.76**4.6★**— 9%**](https://www.amazon.com/dp/B0F1SSHN95) [**NOW Foods Supplements UC-II Type II Collagen with Undenatured Type II Collagen 60 Veg Capsules**NOW Foods**$19.40**4.6★**— 7%**](https://www.amazon.com/dp/B0028J6NRU) [**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**$32.00**4.4★**— 5%**](https://www.amazon.com/dp/B06XW695RT) [**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**$18.68**4.4★**— 2%**](https://www.amazon.com/dp/B0C41RWGN7)
**~~View all trending →~~**
## **What buyers say about uc ii**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Joint Pain**28%
*“helps with joints for me”*
**Quality-Overall**14%
*“Good quality”*
**Ease Of Chewing/Swallowing**7%
*“the small capsule is easy to take”*
**Value For Money**5%
*“Good product, reasonable price”*
**Ease Of Use**5%
*“Makes daily use simple”*
**Vitamin**4%
*“Vitamin”*
**Calcium**4%
*“a mineral rich complex that contributes calcium”*
**Efficiency**4%
*“It works for me”*
**Dosage**3%
*“Easy once-a-day capsule”*
**Side Effects**2%
*“no noticeable side effects”*
### **What buyers complain about **
**Dosage**13%
*“Not as effective as other UC-II I have taken”*
**Quality-Overall**8%
*“That is poor quality control”*
**Value For Money**8%
*“Its expensive,”*
**Functionality-Overall**6%
*“Doesn't work”*
**Calcium**5%
*“Calcium Oxalate Kidney Stones can form in susceptible individuals”*
**Joint Pain**4%
*“Has not helped my joints”*
**Acid Regulator/Stomach Ache Relief**4%
*“upsets my stomach”*
**Advertised Vs Actual Product**3%
*“The product page for these clearly says that it's a "Vegetarian product", but it is NOT.”*
**Smell**3%
*“It smells kind of not great”*
**Taste-Overall**3%
*“It was horrible as I could taste the powdered texture - ruining the drink itself”*
### **Top return reasons **
**Functionality-Overall**33%
**Side Effects**33%
**Value For Money**33%
## **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.
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